To solve this problem, we can use the geometric distribution, which models the number of trials needed to obtain the first success in a sequence of independent trials.
Let X be the random variable representing the number of people a designer needs to ask until they find someone who agrees to be their model. Then X follows a geometric distribution with probability of success p = 0.38.
How to calculate?The probability that a designer needs to ask at most 3 people is the sum of the probabilities that they need to ask 1, 2, or 3 people:
P(X ≤ 3) = P(X = 1) + P(X = 2) + P(X = 3)
We can calculate these probabilities as follows:
P(X = 1) = p = 0.38
P(X = 2) = (1-p) × p = 0.62 × 0.38 = 0.2356
P(X = 3) = [tex](1-p)^{2}[/tex] × p = [tex](0.62)^{2}[/tex] × 0.38 = 0.1448
Therefore, the probability that a designer would have to ask at most 3 people to find someone that would agree to be their model is:
P(X ≤ 3) = P(X = 1) + P(X = 2) + P(X = 3) = 0.38 + 0.2356 + 0.1448 = 0.7604
Rounding this to four decimal places, we get 0.7604, which is closest to the answer option (D) 0.6156. However, none of the given answer options matches the calculated probability exactly.
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I have no idea how to do this pls help
picture attached
The angle measure of the triangle are;
m< A = 53 degrees
m<B = 90 degrees
m<C = 37 degrees
How to determine the valueIt is important to note that the sum of the angles in a triangle is equal to 180 degrees
From the diagram shown, we have that;
m< A = 4x + 1
m< B = 7x - 1
m< C = 3x - 2
Equate the angles, we have;
4x + 1 + 7x - 1 + 3x - 2 = 180
collect the like terms, we get
14x = 180 + 2
14x = 182
make 'x' the subject
x = 13
Then, m< A = 53 degrees
m<B = 90 degrees
m<C = 37 degrees
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If the measure of A equals 61°, what is the measure of B?
If the measure of m∠A = 61°, the angle measure m∠B = 29°.
What is an angle?
Since ΔABC is a right-angled triangle with C as the right angle, we can use the trigonometric ratios to find the missing side lengths and angles.
Given that A = 61°, we know that m∠B = 180° - 90° - 61° = 29° (by the angle sum property of a triangle).
Now, we can use the trigonometric ratios to find the side lengths. Let's start with side AC = x.
From the definition of the sine ratio, we have:
sin(A) = opposite/hypotenuse
sin(61°) = z/x
Therefore, we have:
x = z/sin(61°)
Similarly, from the definition of the cosine ratio, we have:
cos(A) = adjacent/hypotenuse
cos(61°) = y/x
Therefore, we have:
x = y/cos(61°)
Since both expressions equal x, we can set them equal to each other and solve for z:
z/sin(61°) = y/cos(61°)
z = y*tan(61°)
Finally, we can use the Pythagorean theorem to find the length of side BC:
y² = x² - z²
y² = (y/cos(61°))² - (y*tan(61°))²
Simplifying, we get:
y = x*cos(61°)
So, the lengths of the sides are:
AC = x = z/sin(61°)
BC = y = x*cos(61°)
And the missing angle is:
B = 29°
What is trigonometric ratio?
In mathematics, a trigonometric ratio is a ratio of the lengths of two sides in a right-angled triangle. The three primary trigonometric ratios are:
Sine (sin) = Opposite / Hypotenuse
Cosine (cos) = Adjacent / Hypotenuse
Tangent (tan) = Opposite / Adjacent
In these ratios, the hypotenuse is the longest side of the triangle, and it is always opposite to the right angle. The opposite side is the side opposite to the angle of interest, and the adjacent side is the side that is adjacent to the angle of interest (but not the hypotenuse).
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Complete question is: If the measure of m∠A = 61°, the angle measure m∠B = 29°.
Aarón wants to divide the trail mix equally into 6 friends. How much trail mix will be in each bag ? Draw a bar diagram and write an equation
The bar diagram is attached and the equation is amount of trail mix in each bag = x/6
Drawing the bar diagram and the equationLet's say that Aarón has a total of "x" amount of trail mix.
To divide this equally into 6 bags, each bag will have "x/6" amount of trail mix.
We can illustrate this using a bar diagram as follows:
See attachment
Here, the total amount of trail mix "x" is divided equally into 6 parts, with each part representing "x/6" amount of trail mix.
The equation to represent this is:
x/6 = amount of trail mix in each bag.
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?the scale on a map is the scale on a map is 3 is to 10 lakh the distance between two cities is 65 km how far apart are the two cities on the map
HELP PLEASE HELP SHOW WORK ASAP
Answer:
The answer is 4.5 miles.
Step-by-step explanation:
To solve this problem, we must remember that the shortest distance between two points lies along a straight line. In this case, this straight line is the hypotenuse of the triangle formed with the 2 mile and 4 mile legs. As a result, we can use the Pythagorean Theorem to find the distance between Lisa's house and the pool.
Pythagorean Theorem:
a² + b² = c²
2² + 4² = c²
c² = 4 + 16
c = √20
c = 4.5 miles (rounded to the nearest tenth)
Therefore, the shortest distance between Lisa's house and the pool is 4.5 miles.
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[tex]\blue{\huge {\mathrm{PYTHAGOREAN \; THEOREM}}}[/tex]
[tex]\\[/tex]
[tex]{===========================================}[/tex]
[tex]{\underline{\huge \mathbb{Q} {\large \mathrm {UESTION : }}}}[/tex]
Lisa's school is located 2 miles north of her house. The pool is located 4 miles east of her school. What is the shortest distance between her house and the pool? Round your answer to the nearest tenth of a mile.[tex]{===========================================}[/tex]
[tex] {\underline{\huge \mathbb{A} {\large \mathrm {NSWER : }}}} [/tex]
The shortest distance between Lisa's house and the pool is 4.5 miles (rounded to the nearest tenth of a mile).*Please read and understand my solution. Don't just rely on my direct answer*
[tex]{===========================================}[/tex]
[tex]{\underline{\huge \mathbb{S} {\large \mathrm {OLUTION : }}}}[/tex]
We can use the Pythagorean theorem to find the shortest distance between Lisa's house and the pool.
Let's call the distance we're trying to find "d". We know that Lisa's school is 2 miles north of her house and the pool is 4 miles east of her school, so we can draw a triangle with the following sides:
a = 2 miles (the vertical side, from Lisa's house to her school)b = 4 miles (the horizontal side, from Lisa's school to the pool) c = d (the hypotenuse, the shortest distance from Lisa's house to the pool)Using the Pythagorean theorem, we can find d:
[tex]\qquad\qquad\qquad\begin{aligned}\sf c^2& =\sf a^2 + b^2\\\sf d^2& =\sf 2^2 + 4^2\\\sf d^2& =\sf 4 + 16\\\sf d^2& =\sf 20\\\sf d& =\sf \sqrt{20}\\\bold{d}& =\sf \boxed{\bold{\: 4.5\: miles\:}}\end{aligned}[/tex]
[tex]\\[/tex]
Therefore, the shortest distance between Lisa's house and the pool is 4.5 miles (rounded to the nearest tenth of a mile).
[tex]{===========================================}[/tex]
[tex]- \large\sf\copyright \: \large\tt{AriesLaveau}\large\qquad\qquad\qquad\tt 04/01/2023[/tex]
Un chef observó que el 65 % de todos sus clientes consume mayonesa, el 70 % consume kétchup y el 80 % consume mayonesa o kétchup. ¿Cuál es la probabilidad de que un cliente consuma las dos salsas al mismo tiempo
The probability that a customer Consumes both mayonnaise and ketchup at the same time is 0.55 or 55%.
To find the probability that a customer consumes both mayonnaise and ketchup at the same time, we need to use the concept of intersection in probability theory. The intersection represents the overlap or commonality between two events, in this case, the consumption of mayonnaise and ketchup.
Given that 80% of customers consume either mayonnaise or ketchup, we can assume that this includes the customers who consume both. Let's call the event of consuming mayonnaise "M" and the event of consuming ketchup "K". Therefore, we know that P(M U K) = 0.8.
To find the probability of consuming both, we can use the formula P(M ∩ K) = P(M) + P(K) - P(M U K), where ∩ represents the intersection. We can substitute the values we have been given to get:
P(M ∩ K) = 0.65 + 0.70 - 0.8 = 0.55
Therefore, the probability that a customer consumes both mayonnaise and ketchup at the same time is 0.55 or 55%. This means that more than half of the customers consume both, indicating that the chef could consider offering dishes that combine both sauces to cater to this preference.
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How do you find the mean absolute deviation of
(40,39,41,38,42,44,45,37,48,46)
Answer:
the mean absolute deviation is 3
A group consists of four Democrats and six Republicans. Three people are selected to attend a conference.
a. In how many ways can three people be selected from this group of ten?
b. In how many ways can three Republicans be selected from the six Republicans?
c. Find the probability that the selected group will consist of all Republicans.
a. The number of ways to select three people from the group of ten is.
b. The number of ways to select three Republicans from the group of six Republicans is.
c. The probability is
(Type an integer or a simplified fraction.
a. The number of ways to select three people from the group of ten is 120.
b. The number of ways to select three Republicans from the group of six Republicans is 20.
c. The probability is 1/6.
What is probability?
Probability refers to potential. A random event's occurrence is the subject of this area of mathematics. The range of the value is 0 to 1. Mathematics has incorporated probability to forecast the likelihood of various events. The degree to which something is likely to happen is essentially what probability means.
a. The number of ways to select three people from a group of ten is given by the combination formula:
C(10,3) = 10! / (3! * (10 - 3)!) = 120
Therefore, there are 120 ways to select three people from this group of ten.
b. The number of ways to select three Republicans from the six Republicans is given by the combination formula:
C(6,3) = 6! / (3! * (6 - 3)!) = 20
Therefore, there are 20 ways to select three Republicans from the six Republicans.
c. The probability of selecting all Republicans is the number of ways to select three Republicans divided by the total number of ways to select three people:
P(all Republicans) = C(6,3) / C(10,3) = 20/120 = 1/6
Therefore, the probability that the selected group will consist of all Republicans is 1/6.
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Find the length of the segment indicated
The length of the segment indicated in the circle is 12 units
Calculating the length of the segment indicatedFrom the question, we have the following parameters that can be used in our computation:
The circle
Since the radius is perpendicular to the chord and intersects the chord at its midpoint, then the radius will divide the chord into two equal segments.
Using the above as a guide, we have the following:
x = 12
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Question 8 of 10
Find the total price of the three items in the chart below. Enter your answer in
the space provided. Do not include $ in your answer.
ITEM
Bagels
Cream Cheese
Raisins
Answer here
COST
$2.17
$2.82
$3.74
Answer:
$8.73 --> 8.73
Step-by-step explanation:
We need to add their costs together to find the total price of the three items.
The cost of Bagels is given as $2.17.
The cost of Cream Cheese is given as $2.82.
The cost of Raisins is given as $3.74.
Adding these three costs together gives us:
$2.17 + $2.82 + $3.74 = $8.73
Therefore, the total price of the three items is $8.73.
I need help please someone help ?
The inverses of g and h give:
g⁻¹(x) = - (x - 3)/2(g *g⁻¹)(-7) = 85h⁻¹(9) = -7How to define the inverse functions?Here we have the function:
g(x) = -2x + 3
If its inverse is g⁻¹(x), then the composition must be equal to the identity, so we can write:
g( g⁻¹(x)) = x
-2*g⁻¹(x) + 3 = x
g⁻¹(x) = (x - 3)/-2
g⁻¹(x) = - (x - 3)/2
Now we also want to get:
(g *g⁻¹)(-7)
That is the product of the two functions evaluated in -7.
(g *g⁻¹)(-7) = (-2*-7 + 3)*-(-7 - 3)/2 = 85
Now for h(x), we want to get h⁻¹(9)
By looking at the table, we can see that h(-7) = 9
Then the inverse is h⁻¹(9) = -7
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Learning Task 2 : Find the area of each shaded region. Assume that all angles that appear to be right triangle (3 points each).
Thus the shaded area of the given rectangular figure is found as : 60 sq. ft.
Define about the rectangular figure:It needs four sides.There are two pairs of congruent sides on the four sides. This implies that the length of the sides that are opposite one another must be the same.Equal diagonal lengths are necessary. A diagonal line formed by joining two opposing vertices is equal to another diagonal line also formed. They absolutely meet in the midway of the other.Area of rectangle = length x width
Complete rectangular area = 12 ft x 7 ft
Complete rectangular area = 84 sq. ft.
Inner rectangular area = 8 ft x 3ft
Inner rectangular area = 24 sq. ft
Shaded area = Complete rectangular area - Inner rectangular area
Shaded area = 84 sq. ft. - 24 sq. ft
Shaded area = 60 sq. ft
Thus the shaded area of the given rectangular figure is found as : 60 sq. ft.
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Complete question:
find the shaded area of the given rectangular figure.
7.
Find the binomial that must be multiplied by 5x³yz² to obtain 15x³y2z5 + 5x³yz?. (Hint: Divide by the monomial.)
3yz
O 3yz³ + 1
none of the answer choices
MacBook Air
O 15x³y²z5
O 3yz³
Answer:
3yz^3 + 1
Step-by-step explanation:
let b = the binomial we are looking for.
divide and receive your answer
Algebra-Which factor makes these equations correct?? 6xk=54 Kx9=81
Answer:9
Step-by-step explanation: it’s nine because 6×9 = 54
PLEASE PLEASE HURRY I WILL MARK BRAILIEST!!!!!
What type of angles are angles 1 and 7?
Responses:
congruent vertical angles
supplementary same-side exterior angles
congruent corresponding angles
supplementary alternate exterior angles
angles 1 and 7 are congruent corresponding angles because they are in corresponding positions on two parallel lines intersected by a transversal, and they have the same measure or size. Thus, option C is correct.
What is the congruent corresponding angles?Angle 1 and angle 7 are corresponding angles because they are in the same position relative to the transversal and the parallel lines.
Specifically, they are in corresponding positions on the parallel lines, meaning that they are on the same side of the transversal.
in the same position relative to the intersection point of the transversal and the parallel lines, and they are both either interior m, or exterior angles. In this case, angles 1 and 7 are both interior angles.
Furthermore, angles 1 and 7 are congruent corresponding angles because they have the same measure or size.
Therefore, angles 1 and 7 are congruent corresponding angles because they are in corresponding positions on two parallel lines intersected by a transversal, and they have the same measure or size.
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Which expression is equivalent to 3(−2.4y − 16.5)?
0.6y − 16.5
0.6y − 13.5
−7.2y − 16.5
−7.2y − 49.5
I picked b please tell me why im wrong i am stuck
Answer:
D. -7.2y - 49.5 is the correct answer.
Step-by-step explanation:
Distributing the 3 to the terms inside the parenthesis, we get:
3(-2.4y - 16.5) = -7.2y - 49.5
-2.4 x 3 = -7.2
16.5 x 3 = 49.5
so the expression that is equivalent to 3(-2.4y - 16.5) is -7.2y - 49.5
hope this helps
If a = 4, then a³ + a=
I know the answer but can someone explain step by step
Write TWO different equations to express the following situation:
Jerome makes $68 after a day of work. He receives $30 in tips, so he took a home of total of $98 that day.
1. x + 30 = 98 equation says that Jerome's total earnings y for the day is equal to his wages.
2. y = 68 + 30 equation says that Jerome's total earnings y for the day is equal to his wages.
What is equation?A statement that affirms the equality of two expressions connected by the equals symbol "=" is known as an equation. For illustration, 2x - 5 = 13. 2x - 5 and 13 are expressions in this case. These two expressions are joined together by the sign "=".
There are different ways to represent this situation algebraically, but here are two possible equations:
1. Let x be the amount of money Jerome earns in wages, then the equation can be written as:
x + 30 = 98
This equation says that the sum of Jerome's wages x and his tips of $30 is equal to his total earnings of $98 for the day.
2. Alternatively, we can let y be the total amount of money Jerome makes for the day (including tips), then we can write:
y = 68 + 30
This equation says that Jerome's total earnings y for the day is equal to his wages of $68 plus his tips of $30.
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Point A is located at (-3, -5). If point B is 11 units away and is located in quadrant 2, what are the coordinates for point B?
The answer of the given question based on the graph is the coordinates of point B are (-8, 4).
What is Quadrant?A quadrant is one of four regions into which coordinate plane is divided by x-axis and y-axis. The x-axis is horizontal axis and the y-axis is vertical axis. The quadrants are labeled using Roman numerals, starting in upper right quadrant and moving counterclockwise.
Since point B is 11 units away from point A, we know that the distance between them is:
d = √((x2 - x1)² + (y2 - y1)²) = 11
where (x1, y1) = (-3, -5) are the coordinates of point A, and (x2, y2) are the coordinates of point B.
We also know that point B is located in quadrant 2, which means that its x-coordinate is negative and its y-coordinate is positive.
To find the coordinates of point B, we can use the distance formula and the fact that point B is in quadrant 2:
d = √((x2 - x1)² + (y2 - y1)²) => 11 = √((x2 - (-3))² + (y2 - (-5))²)
Since point B is in quadrant 2, its x-coordinate is negative and its y-coordinate is positive:
x2 < 0, y2 > 0
We can choose any values for x2 and y2 that satisfy these conditions and the distance formula equation. Let's choose x2 = -8 and y2 = 4:
11 = √((-8 - (-3))² + (4 - (-5))²)
11 = √(25 + 81)
11 = √106
Therefore, coordinates of point B is (-8, 4).
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Write the statement in words. Let p="The plane is on time." Let q="The sky is clear."
Q->~P
The statement can be read as "If the sky is clear, then the plane is not on time."
What is the conditional statement?
A conditional statement is a logical statement that has two parts: an antecedent (also called a hypothesis) and a consequent (also called a conclusion). The statement asserts that if the antecedent is true, then the consequent must also be true.
The statement "Q -> ~P" is an example of a conditional statement in symbolic logic.
In this case, Q represents "The sky is clear" and ~P represents "The plane is not on time" (the tilde symbol ~ negates the truth value of P).
The arrow symbol -> means "implies" or "if...then". Therefore, the statement can be read as "If the sky is clear, then the plane is not on time."
In other words, the statement is saying that if the sky is clear, then it is not possible for the plane to be on time.
This is because the statement implies that the plane being on time is dependent on the sky not being clear. So if the sky is clear, it means that the conditions for the plane to be on time are not present, and therefore the plane is not on time.
It's worth noting that the statement does not say anything about what happens if the sky is not clear.
It's possible that the plane could still be on time even if the sky is not clear, according to this statement.
Hence, the statement can be read as "If the sky is clear, then the plane is not on time."
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A company is trying to reduce the cost of
producing one of its tools. It comes up with
a much cheaper new method of production.
A large box of tools produced by both methods
is examined by testers.
1. Two tools are selected at random, one at a time.
Part A (3 points)
One tool is chosen at random from the box. It is then replaced. A tool is
selected again. What is the probability that both selections were acceptable?
Are the events dependent or independent events? Explain.
Old Method
New Method
Acceptable
1,640
328
Defective
23
9
Part B (3 points)
One tool is chosen at random from the box. It is not replaced. A tool is selected
again. What is the probability that the first one was produced by the old
method and the second one by the new method? Are the events dependent or
independent events? Explain.
the probability of selecting a tool produced by the old method on the first attempt and a tool produced by the new method on the second attempt is:
P(A and B) = P(A) * P(B | A) = 0.8305 * 0.1998 = 0.1660
How to solve the questions?
Part A:
Let A be the event that the first tool selected is acceptable and B be the event that the second tool selected is acceptable.
We need to find the probability of P(A and B), which can be calculated using the multiplication rule of probability as follows:
P(A and B) = P(A) * P(B | A)
where P(A) is the probability of selecting an acceptable tool on the first attempt and P(B | A) is the conditional probability of selecting an acceptable tool on the second attempt given that the first tool selected was acceptable.
P(A) = (1640 + 328) / (1640 + 328 + 23 + 9) = 0.985
P(B | A) = (1639 + 327) / (1640 + 328 + 23 + 9 - 1) = 0.985
Therefore, the probability of both selections being acceptable is:
P(A and B) = P(A) * P(B | A) = 0.985 * 0.985 = 0.9702
The events are dependent because the probability of selecting an acceptable tool on the second attempt depends on the result of the first attempt.
Part B:
Let A be the event that the first tool selected is produced by the old method and B be the event that the second tool selected is produced by the new method.
We need to find the probability of P(A and B), which can be calculated using the multiplication rule of probability as follows:
P(A and B) = P(A) * P(B | A)
where P(A) is the probability of selecting a tool produced by the old method on the first attempt and P(B | A) is the conditional probability of selecting a tool produced by the new method on the second attempt given that the first tool selected was produced by the old method.
P(A) = (1640 + 23) / (1640 + 328 + 23 + 9) = 0.8305
P(B | A) = 328 / (1640 + 328 + 23 + 9 - 1) = 0.1998
Therefore, the probability of selecting a tool produced by the old method on the first attempt and a tool produced by the new method on the second attempt is:
P(A and B) = P(A) * P(B | A) = 0.8305 * 0.1998 = 0.1660
The events are dependent because the probability of selecting a tool produced by the new method on the second attempt depends on the result of the first attempt.
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8TH GRADE MATH HELP 30 POINTS
Thus, equation of line in slope intercept form: y = 5x + 3.
Define about the slope intercept form:One approach to calculating the equation of a straight line is the slope-intercept form. The two point form, point-slope form, plus intercept form are the further approaches.
The equation of a straight line is expressed using an equation in the slope-intercept form.You must determine the line's slope and the equation's y intercept form in order to get the slope-intercept form. The slope is a measurement of how steep a line is.Passing points - (-2, -7)
slope m = 5
The standard slope intercept form for equation of line:
y = mx + c
m is the slope and c is the y-intercept.
Put the given values and find c.
-7 = 5(-2) + c
c = -7 + 10
c = 3
Thus, equation of line in slope intercept form:
y = 5x + 3
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A bag contains 6 yellow marbles, 4 red marbles, 8 blue marbles. If one marble is drawn from the bag then replaced, what is the probability of drawing a yellow marble then a blue marble?
a) the probability of drawing a yellow marble than a blue marble is (1/3) x (4/9) = 4/27.
b) the probability of guessing a number less than 7 is 6/10 or 3/5.
c) the probability of drawing a white marble than a red marble is (2/9) x (6/17) = 4/51.
What is probability?
Probability is a measure of the likelihood or chance of an event occurring. It is a number between 0 and 1, with 0 representing an impossible event and 1 representing a certain event. The probability of an event is calculated by dividing the number of ways the event can occur by the total number of possible outcomes.
Since the marble is replaced after the first draw, the probability of drawing a yellow marble is 6/18 = 1/3.
Similarly, the probability of drawing a blue marble on the second draw is 8/18 = 4/9.
Therefore, the probability of drawing a yellow marble than a blue marble is (1/3) x (4/9) = 4/27.
There are 6 numbers less than 7 (1, 2, 3, 4, 5, 6) and 10 total numbers, so the probability of guessing a number less than 7 is 6/10 or 3/5.
Since the marble is not replaced after the first draw, the probability of drawing a white marble is 4/18 = 2/9.
The probability of drawing a red marble on the second draw, given that a white marble was drawn first, is 6/17.
Therefore, the probability of drawing a white marble than a red marble is (2/9) x (6/17) = 4/51.
Hence, a) the probability of drawing a yellow marble than a blue marble is (1/3) x (4/9) = 4/27.
b) the probability of guessing a number less than 7 is 6/10 or 3/5.
c) the probability of drawing a white marble than a red marble is (2/9) x (6/17) = 4/51.
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ABC is an isosceles triangle. AB=BC and angle BAC = 40°.
Answer: ABC = 70°, ACB = 70°
Step-by-step explanation:
I think the question asks the other two angles
ABC = (180 - 40)/2
ABC = 70
ABC = ACB since isosceles triangle
ACB = 70
25-2•(4-a) open parentheses and simplify
Answer:
17 - a
Step-by-step explanation:
1. Open parentheses: 25 - 2 x 4-a
2. Follow the Order of Operations to simplify:
-PEMDAS (Parentheses, Exponents, Multiplication, Division, Addition, Subtraction):
- 25-2 x 4 - a
- 25 - 8 - a
- 17 - a
Determine the radius or diameter based upon the given dimensions. d = 20 cm
For the given diameter d=20 cm, the radius is 10 cm.
What is radius?
Radius is a straight line segment that connects the center of a circle or sphere to any point on its circumference or surface respectively. It is a fundamental measurement used in geometry and is denoted by the letter "r". The radius is half the diameter of a circle or sphere, and it is used to calculate important properties of the circle or sphere, such as its circumference, area, and volume.
If d = 20 cm, then d represents the diameter of a circle.
To find the radius (r) of the circle, we divide the diameter by 2:
r = d/2 = 20 cm/2 = 10 cm
Therefore, for diameter d=20 cm, the radius of the circle is 10 cm.
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Terrell wants to take group fitness classes at a nearby gym, but needs to start by selecting a membership plan. With the first membership plan, Terrell can pay $30 per month, plus $1 for each group class he attends. Alternately, he can get the second membership plan and pay $15 per month plus $4 per class. If Terrell attends a certain number of classes in a month, the two membership plans end up costing the same total amount. How many classes per month is that? What is that total amount?
Let's assume that Terrell attends x number of classes in a month. Then, the total cost of the first membership plan would be:
Cost of the first membership plan = $30 + $1 * x
Similarly, the total cost of the second membership plan would be:
Cost of the second membership plan = $15 + $4 * x
As per the problem statement, both membership plans cost the same when Terrell attends a certain number of classes in a month. So, we can equate the above two expressions and solve for x:
$30 + $1 * x = $15 + $4 * x
$2 * x = $15
x = 7.5
Since the number of classes cannot be a fraction, we can round up to the nearest integer, which is 8. Therefore, Terrell needs to attend 8 classes per month to make both membership plans cost the same.
To find the total amount, we can substitute x = 8 in either of the above expressions:
Total amount = $30 + $1 * 8 = $38
Therefore, Terrell needs to attend 8 classes per month, and the total amount would be $38.
You plan to save $5000 in an account which pays 4.5% interest compounded monthly.
How much money will you have at the end of 3 years? Use your FORMULA from your notes.
Make sure to LABEL each variable. You must show your work.
We can use the formula for compound interest to calculate the amount of money we will have at the end of 3 years:
A = P(1 + r/n)^(nt)
Where:
A = the amount of money we will have at the end of 3 years
P = the principal (the initial amount we start with)
r = the interest rate (as a decimal)
n = the number of times the interest is compounded per year
t = the number of years
Plugging in the given values, we get:
A = 5000(1 + 0.045/12)^(12×3)
A = 5000(1.00375)^36
A ≈ $5,622.16
Therefore, we will have approximately $5,622.16 at the end of 3 years.
There are 200 members in a club. 60% of them are males. How many percent more males than females are there?
Answer: If 60% of the members are males, then 40% of the members are females. We can calculate the number of males and females as follows:
Number of males = 60% of 200 = 0.6 * 200 = 120
Number of females = 40% of 200 = 0.4 * 200 = 80
To find out how many percent more males there are than females, we can use the following formula:
% more males = (number of males - number of females) / number of females * 100%
Substituting the values we found, we get:
% more males = (120 - 80) / 80 * 100% = 50%
Therefore, there are 50% more males than females in the club.
Step-by-step explanation:
A chess player won 3 out of 4 games, or 75% of her games, during a tournament. Her goal this season is to win 90% of the
tournament games she plays.
How many more consecutive tournament games would she need to win to meet her goal?
Answer:
She needs to win 6 more consecutive tournament games.
Step-by-step explanation:
[tex] \frac{3 + x}{4 + x} = \frac{9}{10} [/tex]
[tex]10(3 + x) = 9(4 + x)[/tex]
[tex]30 + 10x = 36 + 9x[/tex]
[tex]x = 6[/tex]