Answer:
40mph
Step-by-step explanation:
use the speed = distance/time formula.
1. The first car has a speed of 30mph and travels one mile so the equation can be written as 30mph = 1/t.
Rearrange to get t = 1/30
1/30 of an hour is 2 minutes.
2. The second car has a speed of 60 mph and travels one mile so the equation can be written as 60mph = 1/t
Rearrange to get t = 1/60
1/60 of an hour is 1 minute.
The time it took for the total journey is 1 + 2 = 3 minutes
Writing 3 minutes as a fraction of an hour:
3/60 = 1/20
So using the s = d/t formula to calculate the average speed the formula can be written as (the speed is unknown, time is 1/20 and the distance is 2 miles):
Speed = 2/(1/20) = 2x20/1 = 40
Therefore the average speed of that car is 40 mph.
The purchasing habits of 1,000 grocery shoppers are noted. No associalion is found between the variables. Fill in the empty portion of the table with values that would support this claim. Explain reasoning.
Here is the completed table that shows the purchasing habits of 1000 grocery shoppers :
bought milk bought no milk Total
bought eggs 422 228 650
bought no eggs 150 200 350
Total 572 428 1000
What is a two-way frequency table?A two-way frequency table is used to display data on the frequencies for two categorical variables.
The total number of people who bought eggs = 422 + 228 = 650
The total number of people who bought no eggs = 1000 - 650 = 350
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What is the contrapositive of the following statement?
If M is the midpoint of PQ , then PM is congruent to QM .
Answer:
If PM is not congruent to QM then M is not the midpoint of PQ.
Step-by-step explanation:
The contrapositive is written as If not the conclusion then not the hupothesis.
M is the midpoint of PQ is the hypothesis (the statement after "If").
PM is congruent to QM (the statement after "then").
Find the area of the kite?
i need help i attached this image
Answer:
k = -7
Step-by-step explanation:
Find the difference of the y-values of both vertexes:
f(x): y = 1
g(x): y = -6
g(x) - f(x)
-6 - 1 = -7
The ratio of green marbles to red marbles is 3 to 5. If there are 18 green marbles, how many red marbles are there?
Answer:
The are 5 marbles
Step-by-step explanation:
51/85 = 3/5 As a result, there are 51 red and 85 green marbles.
A teacher has two large containers, A and B, filled with blue, red, and green beads. She wants her students to
estimate the difference (A - B) in the proportion of red beads in each container.
What is the appropriate inference procedure?
• two sample t-test for Ua - Ub
• two sample t-interval for Ua - Ub
• two sample z-test for Pa - Pb
• two sample z-interval for Pa - Pb
Answer:c
Step-by-step explanation:
edge
ebrant spends $76 in a gift shop. This is 80% of the money he planned to
spend in the gift shop. How much money, in dollars, did Mr. Hildebrant plan to
spend in the gift shop?
Answer:
Mr. Hildebrant planned to spend $95 in the gift shop.
Step-by-step explanation:
We want to find 80% of $? equals $76.
We can write an equation to help us solve for x, the money that Mr. Hildebrant planned to spend in the gift shop.
.80x = 76Divide both sides of the equation by .80.
x = 95Mr. Hildebrant planned to spend $95 in the gift shop.
Use the digits 1-9 at lost one time each to make the equation true and give the solution.
Please help soon!!
A cereal box is 9 1/2 inches long, 3 1/2 inches wide, and 12 inches high. What is the volume of the box?
Add the quotient of 120 and 3 to the product of 15 and 10.
Answer:
190
Step-by-step explanation:
quotient: 120/3=40
product: 15*10=150
adding them:150+40=190
Answer:
190
Step-by-step explanation:
quotient: 120/3=40
product: 15*10=150
adding them:150+40=190
The diameter of a circle is 100 cm. What is the circumference of the circle? (Use 3. 14 for π. )
Explanation:
Use the formula C = pi*d
We're multiplying 3.14 by the diameter 100 to get 314, which is the approximate distance around the circle (aka perimeter). The value is approximate because pi = 3.14 is approximate.
What is the roasting time for a
12-pound turkey?
Help me pls. Ive been dying to solve one of these. Could someone explain
Answer:
5(10k+1)+2(2+8k)
=50k+5+4+16k
=66k+9 OR 3(22K+3)
(ANSWER)
Answer:
66k + 9
Step-by-step explanation:
The question isn't mentioned, so assuming we need to simplify :
5(10k + 1) + 2(2 + 8k)Distribute the terms in the parentheses.
5(10k) + 5(1) + 2(2) + 2(8k)50k + 5 + 4 + 16kCombine like terms.
50k + 16k + 5 + 466k + 9how do you balance ___NaBr + ___Ca--> CaBr2 + Na
Step-by-step explanation:
NaBr 2 102.89
Ca 1 40.08
CaBr2 1 199.89
Na 2 22.99
Find the least positive integer value of p for which the line y = px -2 will meet the curve 4(y - 3) = x².
Write the expression. Then, check all that apply. twice the difference of a number and six A 2-column table with 4 rows. Column 1 is labeled Key Words with entries twice, the difference of, a number, six. Column 2 is labeled Replace with entries 2 times, (minus), n, 6. Replace “a number” with the variable, n. The two operations are multiplication and addition. The two operations are multiplication and subtraction. The constants are 2 and 6. The expression is written as 2(n – 6). The expression is written as 2 × 6 – n.
The expression is 2(n-6), and in these two operations are
multiplication and subtraction with two constants 2, and 6.
What is an arithmetic operation?Arithmetic is an area of mathematics involving the study of numbers and the different operations that can be performed on them. Addition, subtraction, multiplication, and division are the four basic math operations.
We have:
Twice the difference between a number and six
Let's suppose the number is n, then the expression becomes:
= 2(n-6)
The true statements are:
The two operations are multiplication and subtraction.The constants are 2 and 6. The expression is written as 2(n – 6)Thus, the expression is 2(n-6), and in these two operations are
multiplication and subtraction with two constants 2, and 6.
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Answer:
-Replace “a number” with the variable, n
-The two operations are multiplication and subtraction
-The constants are 2 and 6.
-The expression is written as 2(n – 6).
Step-by-step explanation:
EDGE 2022
Find one value of x that is a solution to the equation:
(x^2-6)^2=-3x^2+18
x=
Answer:
Step-by-step explanation:
hi what is pi and why do we need pi and math
Answer:
Pi is used to find the area and circumference of a circle. Pi can be used to find an area by multiplying the radius of the circle squared times pi.
Step-by-step explanation:
Have a great rest of your day
#TheWizzer
Select the FALSE statement about completely random design. a.) Subjects are randomly assigned to treatments. b.) Any number of treatments may be addressed. c.) The additional variables affect different control groups differently. d.) It minimizes the effects of confounding variables.
Answer:
your answer is A.
Step-by-step explanation:
The false statement about completely random designs is this: c.) The additional variables affect different control groups differently.
What is the false statement?The false statement about completely random designs is that additional variables affect different control groups differently. It is however true that in completely random esigns, the subjects are randomly assigned to treatments and any number of treatments may be addressed.
Also, the goal of this type of design is to reduce the effects of confounding variables. So, the correct option number that describes the false statement is C.
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Two containers designed to hold water are side by side, both in the shape of a
cylinder. Container A has a diameter of 12 feet and a height of 16 feet. Container B
has a diameter of 16 feet and a height of 13 feet. Container A is full of water and the
water is pumped into Container B until Container A is empty.
After the pumping is complete, what is the volume of water in Container B, to the
nearest tenth of a cubic foot?
A. 3.667 inches
B. 5.333 inches
C. 8.125 inches
D. 8.333 inches
Triangle H N K is shown. Angle H N K is 90 degrees. The length of hypotenuse H K is n, the length of H N is 20, and the length of N K is 9.
Law of cosines: a2 = b2 + c2 – 2bccos(A)
What is the value of n to the nearest whole number?
18
22
29
41
Answer:
B just took the test
Step-by-step explanation:
have a good rest of your day
15) A, B, C, D, E and F are towns situated as follows. * A is 30 km east of D * C is 20 km east of E * F is 10 km west of B * D is 10 km south of F * A is 10 km north of C How far would you need to travel to get from B to E?
Answer:
Option D: 20km South
Step-by-step explanation:
Lets say A = (0, 0)
Finding B:A is 30km East of D which makes D = (-30, 0)
D is 10km South of F which makes F = (-30, 10)
F is 10km West of B which makes B = (-20, 10)
Finding E:A is 10km North of C which makes C = (0, -10)
C is 20km East of E which makes E = (-20, -10)
Finding the answer:Find distance from B = (-20, 10) to E = (-20, -10)
1. Cancel equivalent values:
x of B = (-20) and x of E = (-20)
Remove x from equation.
2. Solve for answer:
B = 10 and E = (-10)
Find the difference: (-10) - 10 = (-20)
Conclusion:
South translates to negative on a graph making the answer 20km South
Hope this helped :)
help plssss
Optimize the equation P = 3x + y using the constraints
x ≥ 0, x ≤ 4, y ≥-1 and y ≤ 5.
What is the maximum?
Answer:
P = 17
Step-by-step explanation:
let's separate this into x and y components
x component: 3x
as x increases, so does the x component. e.g. 0 * 3 = 0, 4 * 3 = 12. therefore, we want x as high as possible
y component: y
as y increases, so does the y component. this is because the y component is literally just y.
therefore, given these two, to maximize P, we want x and y to be as high as possible
in 0 ≤ x ≤ 4, the maximum of x is 4
in -1 ≤ y ≤ 5, the maximum of y is 5
plug these in to get
3(4) + 5 = 17 as our answer
Answer:
17
Step-by-step explanation:
Part A
At Fairview Middle School, 75 band members need to raise a total of $8,250 for a trip. So far, they have raised $3,120.
How much money, in dollars, per band member, still needs to be raised for the trip?
Enter your answer in the box.
Part B
The entire band decides to have a concert to raise the money for the trip. Tickets for the concert will cost $7.50 each. A local business agrees to donate an additional $0.50 for each $1.00 in ticket sales to the band for their trip.
What is the least number of concert tickets the band must sell in order to raise the rest of the money needed for the trip?
Enter your answer in the box.
NEED HELP ASAP
Answer: 11,370
Step-by-step explanation:
You need to add them all.
Does anyone know the correct equation?
Enter the values needed to find the
length AB. (Simplify your answer.)
A(-3a, b)
B(3a b)
AB = V([?D2 + (0)2
Cra, 5b)
Distance Formula
Pleases help
The value that can take the place of "?" is -6a. The length of line AB is 6a units.
What is the length of any line on the graph?The distance or length of any line on the graph,
[tex]d = \sqrt{(x_2-x_1)^2+(y_2-y_1)^2}[/tex]
where,
d = distance/length of the line between point 1 and 2,
(x₁ , y₁) = coordinate of point 1,
(x₂ , y₂) = coordinate of point 2,
The length of a line with two points known is written as,
[tex]d = \sqrt{(x_2-x_1)^2+(y_2-y_1)^2}[/tex]
Given the coordinate of points A and B are (-3a,b) and (-3a,b), respectively. Therefore, the length of the line AB can be written as,
[tex]AB = \sqrt{(-3a-3a)^2+(b-b)^2}\\\\AB = \sqrt{(-6a)^2+(0)^2}\\\\AB = 6a[/tex]
Hence, the length of line AB is 6a units.
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Which number can both 6 and 12 be evenly divided by?
A. 2
B. 3
C. 4
D. 6
E. 8
F. 12
Answer:
by 3
Step-by-step explanation:
cuz 2x3=6 right so in the other 3x4=12 so is that good for you :D
find the surface area 10.2 mi 14 mi
Answer:
The surface area = 320.442450666159 mi²Step-by-step explanation:
Formula : ( surface area of a cone )_________________________
The total surface area = The curved surface area + area of the base
____________________________________________________
→The curved surface area = π × r × g = π × r × (√(h2 + r2))
where g is the slant height of the cone and r is the radius of the base
and h is the height of the cone
and g = √(h2 + r2)
→Area of the base = π × r²
We get :
The curved surface area = π × r × (√(h2 + r2))
= π × 5.1 × √(14^2+(5.1)^2)
= 238.729625746288
Area of the base = π × r²
= π × (5.1)^2
= 81.712824919871
Conclusion:
The total surface area = The curved surface area + area of the base
= 238.729625746288 + 81.712824919871
= 320.442450666159
Please help with math problem?
Answer:
KM=41.6
Step-by-step explanation:
[tex]\frac{HJ}{IJ} =\frac{KM}{ML} \\\frac{8}{6} =\frac{KM}{31.2} \\[/tex]
Cross Multiply and Solve for KM.
[tex]6*KM=8*31.2\\KM=\frac{8*31.2}{6} \\KM=41.6[/tex]