Step-by-step explanation:
Factor out 3 a^2 b from the numerator to get :
3a^2b ( 2a-4a^2+5ab- b ) / 3a^2b then the 3a^2b 'cancels out'
and you are left with
2a -4a^2 + 5ab - b <====this is the answer
but it can be further factored to:
2a (1-4a) + b(5a-1) if you want this form
Answer:
2a -4a^2 + 5ab - b
Step-by-step explanation:
I did the test
Hope this help :)
Each big square below represents one whole.
A big square with 100 of the 100 equal pieces shaded
A big square with 5 of the 100 equal pieces shaded
Express the shaded area as both a fraction and a decimal.
Fraction:
Decimal:
A big square with 100 squares in the whole square. 5 of those squares are shaded. The shaded area as both a fraction and a decimal is expressed as:
Fraction: 5/100
Decimal: 0.05
What are decimals and fractions?In the form of a numerator and a denominator, fractions express a portion of a whole. Decimals are used to express fractions with a denominator of a power of ten, such as 10, 100, or 1000, in numerical form. Arithmetic is the representation of fractions in their decimal form, where the denominator is 10 or a power of 10 more, such as 100, 1000, or 10,000, etc.
Given:
Area of the whole square = 10 by 10
= 10×10 = 100unit²
The shaded area expressed as a fraction = 5unit²/100unit²
= 51/100
Shaded area expressed as a decimal = 5/100
Then take the number 5 and carry the point by two decimal place from the right
= 0.05
Shaded area expressed as a percent of the whole = (5/100) × 100
= (5×100)/100
= 5%
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show that p/p²- 7 ÷ p²/p²- 49 can be written in the form a + b/p where a and b are integers
We can simplify the expression as follows:
p/(p² - 7) ÷ p²/(p² - 49)
= p/(p² - 7) * (p² - 49)/p² (by flipping the second fraction and multiplying)
= p(p + 7)(p - 7)/(p² - 7)(p²)
= (p + 7)(p - 7)/(p²)
Now, we can write this expression in the form of a + b/p as follows:
(p + 7)(p - 7)/(p²) = (p² - 49 + 2 * 49p)/(p²)
= 1 - 49/p² + 98/p³
Therefore, we can write the expression as:
p/(p² - 7) ÷ p²/(p² - 49) = (p + 7)(p - 7)/(p²) = 1 - 49/p² + 98/p³
So, we have expressed the given expression in the desired form of a + b/p where a = 1 and b = 0 and they are both integers.
a bowl contains 10 red balls and 10 blue balls. a woman selects balls at random without looking at them. what is the minimum number of balls she must select to be sure of having at least three blue balls?
The minimum about of balls she should pick is 13.
So, the woman consider all the balls and picks the balls without looking,
To have a clear chance of picking at least 3 blue balls from the bowl she has to first eliminate the possibility of picking red balls.
Therefore,
She first picks 10 balls from the bowl, which gradually eliminates the possibility of picking a red ball.
now, she picks 3 more balls from the rest of the available balls which increases the changes of the balls being blue.
then,
=> 10 + 3 = 13
The minimum about of balls she should pick is 13.
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Which square root of 225 has a negative value?
The two square roots of 225 are +15 and -15.
However, since negative values are usually not considered answers for practical purposes, the principal square root of 225 is +15 (i.e., √225 = 15).
can yall for real help ?
A spinner is divided into five colored sections that are not of equal size: red, blue, green, yellow, and purple. The spinner is spun several times, and the results are recorded below:
Spinner Results
Color Frequency
Red 19
Blue 4
Green 11
Yellow 15
Purple 4
Based on these results, express the probability that the next spin will land on red or green or yellow as a percent to the nearest whole number.
The probability of the next spin landing on red or green or yellow is approximately 85%.
what is probability?
Probability is a measure of the likelihood or chance of an event occurring. It is a number between 0 and 1, where 0 indicates that the event is impossible and 1 indicates that the event is certain to occur.
In the given question,
The total frequency of all colors is:
19 (red) + 4 (blue) + 11 (green) + 15 (yellow) + 4 (purple) = 53
The probability of the next spin landing on red or green or yellow is the sum of the frequencies of these colors divided by the total frequency:
(19 + 11 + 15) / 53 = 45 / 53
To express this as a percent to the nearest whole number, we can multiply by 100 and round to the nearest whole number:
(45 / 53) * 100 ≈ 85%
Therefore, the probability of the next spin landing on red or green or yellow is approximately 85%.
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Answer:
Step-by-step explanation:
73%
solve this system of equations by using the elimination method. 2x+6y=10 -3x+1y=5
PLEASE
Answer:
x = -1
y = 2
Step-by-step explanation:
2x + 6y = 10
-3x + 1y = 5
Time the second equation by -6
2x + 6y = 10
18x - 6y = -30
20x = -20
x = -1
Now put in -1 for x and solve for y
2(-1) + 6y = 10
-2 + 6y = 10
6y = 12
y = 2
Let's Check
2(-1) + 6(2) = 10
-2 + 12 = 10
10 = 10
So, x = -1 and y = 2 is the correct answer.
please help.
see below
Answer:
A
Step-by-step explanation:
in any right triangle the sine ratio of an angle Θ is
sinΘ = [tex]\frac{opposite}{hypotenuse}[/tex]
A 6 inch by 10 inch rectangle is dilated by a factor of 2. What is the area of the dilated rectangle?
is 4/9 half of 8/18 shaw how you know
Answer:
To show this, we can simplify both fractions to a common denominator and compare them.
First, we can simplify 8/18 to 4/9 by dividing both the numerator and denominator by 2.
Then, we can compare 4/9 to 4/9.
Since both fractions are equal, we know that 4/9 is half of 8/18.
Alternatively, we can cross-multiply and simplify to compare the fractions:
4/9 = (1/2) * 8/18
4/9 = 4/9
A quadratic function and an exponential function are graphed below. How do the decay rates of the functions compare over the interval ?The exponential function decays at one-half the rate of the quadratic function.The exponential function decays at the same rate as the quadratic function.The exponential function decays at two-thirds the rate of the quadratic function.The exponential function decays at three-fourths the rate of the quadratic function.
Triangle
P
Q
R
PQR is a right triangle. The triangle has vertices at
P
(
−
2
,
4
)
,
Q
(
3
,
4
)
P(−2,4), Q(3,4) and
R
(
−
2
,
−
2
)
R(−2,−2). Graph the triangle on the triangle on the coordinate plane. To graph a triangle, plot all the vertices on the coordinate plane.
The graph of the triangle PQR is created by connect the three vertices.
What is triangle?A triangle is a three-sided polygon with three angles. It is a fundamental geometric shape and is often used in geometry and trigonometry. A triangle is a clοsed, 2-dimensiοnal shape with 3 sides, 3 angles, and 3 vertices. A triangle is alsο a pοlygοn.
To graph the triangle PQR, we first plot the three vertices P(-2,4), Q(3,4), and R(-2,-2) on a coordinate plane:
Now, we connect the three vertices to form the triangle PQR:
Thus, the graph of the triangle ΔPQR is shown in the attachment..
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the total number of sides in 2 regular polygons is 13, and tge titak number of diagonals is 25. how many sides is each polygon
One polygon has 6 sides and the other has 7 sides.
Polygons are closed 2D shapes made up of straight lines. Regular polygons have sides of equal length and angles of equal measure. In this problem, we are given information about two regular polygons.
We are told that the total number of sides in both polygons is 13. Let's call the number of sides in one polygon "n" and the number of sides in the other polygon "m". Then, we know that:
n + m = 13
Next, we are given the total number of diagonals in both polygons, which we can calculate using the formula:
d = (n(n-3) + m(m-3))/2
where "d" is the total number of diagonals. We are told that d = 25. Substituting this value and the equation for n + m into the diagonal formula, we get:
25 = (n(n-3) + m(m-3))/2
25 = (n² - 3n + m² - 3m)/2
50 = n² - 3n + m² - 3m
We can use the equation n + m = 13 to solve for one variable in terms of the other. For example, we can solve for "m" by subtracting "n" from both sides:
m = 13 - n
Substituting this into the previous equation, we get:
50 = n² - 3n + (13-n)² - 3(13-n)
50 = n² - 3n + 169 - 26n + n² - 36 + 3n
Simplifying this equation, we get:
2n² - 26n + 45 = 0
We can use the quadratic formula to solve for "n":
n = (26 ± √376)/4
n ≈ 5.61 or n ≈ 8.39
Since we are dealing with whole numbers of sides, "n" must be either 6 or 8. Plugging each value into the equation n + m = 13, we find that the other polygon must have the opposite value.
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The line plot displays the cost of used books in dollars.
A horizontal line starting at 3 with tick marks every one unit up to 8. The line is labeled Cost in Dollars, and the graph is titled Cost of Used Books. There are two dots above 4, 5, and 7. There are four dots above 6.
Which measure of center is most appropriate to represent the data in the graph, and why?
The median is the best measure of center because there are no outliers present.
The mean is the best measure of center because there are no outliers present.
The median is the best measure of center because there are outliers present.
The mean is the best measure of center because there are outliers present.
What is the appropriate measure of variability for the data shown, and what is its value?
The range is the best measure of variability, and it equals 18.5.
The IQR is the best measure of variability, and it equals 45.
The range is the best measure of variability, and it equals 45.
The IQR is the best measure of variability, and it equals 18.5.
The measure οf the center that is mοst apprοpriate tο represent the data in the line plοt graph is -
Optiοn A: The median is the best measure οf center because there are nο οutliers present.
What is line plοt?A line plοt is a graph that uses symbοls tο represent data abοve a frequency number line tο indicate the frequency οf each value. It is emplοyed tο arrange the data simply and is very simple tο understand.
Since the data is displayed using a line plοt and the plοt shοws the frequency οf data values, it is clear that the data is discrete.
In this case, the apprοpriate measure οf center wοuld be the median, which is the middle value when the data is arranged in οrder.
The fact that there are sοme dοts abοve certain values suggests that these values οccur mοre frequently in the data set.
Hοwever, this dοes nοt necessarily mean that there are οutliers present. Outliers are extreme values that are far away frοm the majοrity οf the data and can skew the results when using the mean as a measure οf center.
Therefοre, the median is the mοst apprοpriate measure οf center in this case because it is nοt affected by the presence οf οutliers and it represents the middle value οf the data set.
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assume two coins, one fair and the other is unfair. you pick one at random, flip it five times, and observe that it comes up as tails all five times. what is the probability that you are flipping the unfair coin?
The probability of flipping the unfair coin given that we observed five tails in a row is approximately 0.9048
Let's define
A: the event of picking the unfair coin
B: the event of getting five tails in a row
We want to find the conditional probability of picking the unfair coin given that we observed five tails in a row, or P(A|B).
Using Bayes' theorem, we have
P(A|B) = P(B|A) × P(A) / P(B)
P(B|A) is the probability of getting five tails in a row given that we are flipping the unfair coin. Since the unfair coin is not fair, we don't know its probability of coming up as tails, but let's assume it has a probability of 0.9 of coming up as tails. Thus, P(B|A) = 0.9^5 = 0.59049.
P(A) is the prior probability of picking the unfair coin, which is 0.5 since we picked one of two coins at random.
P(B) is the total probability of getting five tails in a row, which is the sum of the probabilities of getting five tails in a row with the fair coin and the unfair coin.
The probability of getting five tails in a row with the fair coin is 0.5^5 = 0.03125. The probability of picking the unfair coin and getting five tails in a row is P(B|A) × P(A) = 0.59049 × 0.5 = 0.295245. Thus, P(B) = 0.03125 + 0.295245 = 0.326495.
Now we can calculate P(A|B)
P(A|B) = P(B|A) × P(A) / P(B) = 0.59049 × 0.5 / 0.326495 = 0.9048
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f(x) = 12x - 4.8x²
find the average rate of change over the interval 0
To find the average rate of change of a function over a given interval, we need to calculate the change in the function over that interval, and divide by the length of the interval.
In this case, we want to find the average rate of change of the function f(x) = 12x - 4.8x^2 over the interval [0,5].
First, we need to find the value of the function at the endpoints of the interval:
f(0) = 12(0) - 4.8(0)^2 = 0
f(5) = 12(5) - 4.8(5)^2 = -72
Next, we calculate the change in the function over the interval:
Change in f(x) = f(5) - f(0) = -72 - 0 = -72
Finally, we divide the change in the function by the length of the interval:
Average rate of change = (Change in f(x)) / (Length of interval) = (-72) / (5-0) = -14.4
Therefore, the average rate of change of the function f(x) = 12x - 4.8x^2 over the interval [0,5] is -14.4.
what if you were not restricted to using just rectangles to fill up the space between the curve and the x-axis? suggest a different geometric shape that you think might give us a more accurate estimate for this area? justify why you think your new geometric shape would yield a more accurate result.
If you were not restricted to using just rectangles to fill up the space between the curve and the x-axis, a different geometric shape that might give a more accurate estimate for this area is a trapezoid.
Using trapezoids would likely yield a more accurate result because they can better approximate the curve's shape.
Here's a step-by-step explanation of how using trapezoids can provide a more accurate estimate:
Divide the interval on the x-axis into equal subintervals.
In each subinterval, form a trapezoid by connecting the endpoints of the subinterval to the curve and then closing the shape by drawing a horizontal line from the curve to the x-axis
Calculate the area of each trapezoid using the formula: A = (1/2) * (base1 + base2) * height, where base1 and base2 are the lengths of the parallel sides of the trapezoid (the lengths along the x-axis and the curve), and the height is the length of the vertical line connecting the two bases (the width of the subinterval)
Sum the areas of all trapezoids to approximate the total area between the curve and the x-axis.
The reason trapezoids can provide a more accurate estimate is that they can closely follow the shape of the curve, especially when the curve is not a straight line. Since trapezoids have two different base lengths, they can better accommodate the changes in the curve's slope within each subinterval. This results in a closer fit to the curve compared to using rectangles, which can overestimate or underestimate the area depending on the curve's concavity.
Overall, using trapezoids for estimating the area under a curve can provide more accurate results, especially as the number of subintervals increases.
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A petri dish contains 4 viruses. Each hour, the number of viruses increases, as shown in the table. The population change can be modeled by a geometric sequence. Write a recursive formula and an explicit formula that can model this sequence. Use the formulas to predict how many viruses will be in the dish by the 7th hour.
We predict that there will be 512 viruses in the dish after 7 hours.
What is the model of the population?To model the population growth of the viruses in the dish, we can use a geometric sequence with a common ratio of 2, because the number of viruses doubles every hour.
Let Vn be the number of viruses in the dish after n hours. Then we have:
Recursive formula: Vn = 2Vn-1, with V0 = 4 (since we start with 4 viruses).
Explicit formula: Vn = 4 × 2n.
To predict how many viruses will be in the dish by the 7th hour, we can plug n = 7 into the explicit formula:
V7 = 4 × 27 = 4 × 128 = 512.
Therefore, we predict that there will be 512 viruses in the dish after 7 hours.
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I NEED HELP ON THIS ASAP!!!
The perimeter of triangle XYZ with the vertices, X(2, 5), Y(10 9), and Z(6, 1), is approximately 24.07 units.
How to Find the Perimeter of a Triangle?To find the perimeter of the triangle, we need to add up the lengths of all three sides. To do this, we can use the distance formula, which is:
d = √[(x2 - x1)² + (y2 - y1)²]
Using this formula, we can find the length of each side of triangle XYZ:
Side XY:
d = √[(10 - 2)² + (9 - 5)²] = √64 + 16 = √80
Side YZ:
d = √[(6 - 10)² + (1 - 9)²] = √16 + 64 = √80
Side ZX:
d = √[(6 - 2)² + (1 - 5)²] = √16 + 16 = √32
Therefore, the perimeter of triangle XYZ = XY + YZ + ZX = √80 + √80 + √32
Perimeter ≈ 24.07 (rounded to two decimal places)
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HELPPPPPPPPP PLEASE HURRY !!!!!!!!!!!!!!!!! GIVING 40 POINTS!!!!!!!!!!!!!!!!!!
HELPPPPPPPPPPPPPPPPP
The time to reach the maximum height is 3 seconds and the maximum height is 44.1 meters, and other solutions are below
The height of the cannot at launchTo do this, we find h when t = 0
From the graph, we have
h(0) = 70
So, the height of the cannot at launch is 70 meters
The time to reach the maximum heightFrom the graph, we have the vertex to be
Vertex, (t, h) = (3, 114.1)
So, the time to reach the maximum height is 3 seconds
The maximum heightFrom the graph, we have the vertex to be
Vertex, (t, h) = (3, 114.1)
So, the maximum height is 114.1 meters
How long to land on the groundThis is when h(t) = 0
From the graph, we have
h(7.93) = 0
So, the time spent is 7.93 seconds
The equation if the velocity changesThe given equation is
h(t) = -4.9t^2 + 29.4t + 70
If the initial velocity changes, then the equation becomes
h(t) = -4.9t^2 + 40.5t + 70
The equation if the height of launch is 0The given equation is
h(t) = -4.9t^2 + 29.4t + 70
If the initial height changes, then the equation becomes
h(t) = -4.9t^2 + 29.4t
The time to reach the maximum height and the maximum heightWe have
h(t) = -4.9t^2 + 29.4t
Differentiate and set to 0
-9.8t = -29.4
So, we have
t = 3
Next, we have
h(3) = -4.9 * 3^2 + 29.4 * 3
h(3) = 44.1
So, the time to reach the maximum height is 3 seconds and the maximum height is 44.1 meters
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Select the correct answer.
This table represents value of a cubic polynomial function.
Based on the information in the table, which sentence best describes the interval [-2, 1]?
A. The function is increasing on the interval [-2, 1].
B. The function is both increasing and decreasing on the interval [-2, 1].
C. The function is decreasing on the interval [-2, 1].
D. The function is constant on the interval [-2, 1].
The function is both increasing and decreasing on the interval [-2, 1]. The y values decrease from 12 to 0 and then increase to 7.5 through 6. Therefore option B is correct answer.
In mathematics, a function is an expression, rule, or law that establishes the relationship between two variables (the dependent variable). In mathematics, functions are everywhere, and they are crucial for constructing physical relationships in the sciences. German mathematician Peter Dirichlet first offered the modern definition of function in 1837.
Y and x are related in such a way that there is a distinct value of y for each value of x, and this relationship is frequently represented as y = f(x), or "f of x." In other words, the same x cannot have more than one value for f(x). The domain and range of the function are the set of values of f(x) that are produced by the values in the domain of the function, which is the set of values of x. In addition to f(x), other abbreviated symbols for functions of the independent variable x include g(x) and P(x), especially when the nature of the function is ambiguous or unspecified.
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I need a answer for this
The graph that represents a function is the absolute value graph
Identifying the graph that represents a functionThe vertical line test is a way to determine whether a graph represents a function or not.
To apply the vertical line test, we draw a vertical line through the graph.
If the vertical line intersects the graph at more than one point, then the graph does not represent a function. If the vertical line intersects the graph at only one point, then the graph represents a function.The graph that represents a function using the above as a guide is the absolute value graph in option a
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Can someone please help me ASAP it’s due today!! I will give brainliest if it’s all done correctly.
Answer part A, B, and C for brainliest!!
(a) The experimental probability of rolling a 3 is approximately 8%.
(b) The experimental probability of rolling a 6 is 25%.
(c) The experimental probability of rolling a number less than 4 is 50%.
What is the experimental probability of rolling a 3?
The experimental probability of rolling a 3 can be determined from the result presented in the table as shown below.
from the result presented, there a total outcome of 12
number of rolling a 3 in the result = 1
P(3) = 1/12 = 0.083
P(3) ≈ 8%
The experimental probability of a rolling a 6 is calculated as;
number of 6 obtained in the result = 3
P(6) = 3/12
P(6) = 0.25
P(6) = 25%
The experimental probability of rolling a number less than 4:
P ( less than 4) = P(1) + P(2) + P(3)
P ( less than 4) = 17% + 25% + 8%
P ( less than 4) = 50%
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Darius is building a table. He cuts 12-foot-long boards into sections that are each ¼ foot long. How many sections of the board will Darius have when he is finished cutting?
Answer: 48
Step-by-step explanation: 1/4 goes into 1 four times: 4x12=48
if a cylinder has a height of 7 inches and a volume of 2908.33in3 guns it’s diameter
The diameter of the cylinder is approximately 22.98 inches.
To find the diameter of the cylinder, we need to first find the radius using the formula for the volume of a cylinder:
Volume = π × r² × h
Given:
Volume (V) = 2908.33 in³
Height (h) = 7 inches
We will rearrange the formula to find the radius (r):
r² = Volume / (π × h)
Now, plug in the given values:
r² = 2908.33 / (π × 7)
r² ≈ 131.95
Now, find the square root to get the radius:
r ≈ √131.95
r ≈ 11.49 inches
Since the diameter is twice the radius, we can find the diameter (d) by:
d = 2 × r
d = 2 × 11.49
d ≈ 22.98 inches.
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loretta wants to put a circular mirror on a wall. the mirror has a radius of 23 inches. how many square inches of space will the mirror take up on the wall?
5,761.28 square inches of space will require the mirror to take up on the wall when Loretta wants to put a circular mirror on a wall.
We can find the space that the mirror takes up on the wall by using the area of a circle. it is given by:
A = πr^2
where
A = area of a circle
r =radius of a circle
Given data
radius of the mirror = 23 inches
The area of the mirror is:
A = π(23)^2
= 1,661π
where assume π =3.14159:
A = 1,661(3.14159)
A = 5,761.28 square inches
Therefore, the mirror will take up approximately 5,761.28 square inches of space on the wall.
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Which one of the following is not equal reast
A 2 of 15
B 3/2 of 400
C 5 of 60
D 6 of50%
Answer:Option(a)
Step-by-step explanation: A) 2 of 15
a cable of density p pounds per foot is used to lift w pounds of coal up a mineshaft that is 632 feet deep. how much work is done in this process?
The work done in the process of lifting coal up a mineshaft that is 632 feet deep is found to be 650,000 ft/lb.
For a cable of density, work = ∫k*y dy from 0 to b.
where k is the linear density of the cable (in lb/ft in this case), y is the distance from the top of the cable, and b is the total distance the weight has to travel to the bottom of the cable.
With this setting, the top of the cable should be labeled y=0 and the bottom of the cable (connected to the coal weight) should be labeled y=b. In this case, k = 2 ft/lb and b = 500 ft.
The 800 lb coal weight is additional information that we have not yet calculated.
Since pounds are a unit of force and the force to lift the coal is constant at 800 pounds, you can add the weight of 800 pounds to the integral and the work done to lift the coal is force * distance . The final integral is:
work = ∫(2y + 800) dy from 0 to 500.
integral:
Work = y2 + 800y | 0 to 500
= (500)2 + 800(500)
So, the work done is 650,000 ft/lb.
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Complete question - A cable that weighs 2 lb/ft is used to lift 800 lb of coal up a mine shaft 500 ft deep. Find the work done.
What is the equation of the line that is parallel to y = 6x - 1 and passes through the point (-3, 4)?
The equation will be in slope-intercept form.
Oy=-6x + 5
Oy=6x14
0y=-1/6x-5
O y = 6x + 22
Oy=-1/6x-7
Answer:
y=6x+22
Explanation:
Parallel lines have the same slope and different y-intercepts.
So, all the lines with different slopes will be eliminated.
Now, we can check which line passes through the point (3,4) by substituting x for the x coordinate and y for the y coordinate.
y=6x+22
4=6(-3)+22
4=-18+22
4=4
So, the correct answer is y=6x+22.
what percentage of the world's land area has been granted some degree of protection in a park or preserve? view available hint(s)for part a what percentage of the world's land area has been granted some degree of protection in a park or preserve? 100% 90% 15% 1%
The answer to the question, "What percentage of the world's land area has been granted some degree of protection in a park or preserve?" is 15%.
What is a protected area?
A protected area is a defined geographical space, recognised, dedicated and regulated, through legal or other effective means, to achieve the long-term conservation of nature with associated ecosystem services and cultural values.
How does a protected area achieve conservation?
A protected area, by definition, is a place dedicated to the protection and maintenance of biodiversity and other natural and cultural resources of the area. Protected areas often encompass critical habitats, ecosystems, and landscapes. They offer essential ecological, economic, social, and cultural benefits to society.Conservation objectives are reached by restricting, regulating or prohibiting human activities in the protected area. Some common ways in which protected areas achieve conservation goals include:Enforcing regulations, including limits on extractive and polluting activities.Monitoring and managing species, ecosystems and landscapes to ensure their continued viability and integrity.Restoring degraded habitats or managing them for their long-term health and function.
What is a National Park?
A national park is a natural or semi-natural space designated to protect natural and cultural resources. National parks are established by governments to preserve a country's heritage, usually with the aim of promoting recreation and tourism.
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