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Leto [7]
3 years ago
15

Contestants in a dance-a-thon rest for the same amount of time every hour. A couple rests for 20 minutes in 5 hours. How long di

d they rest in 8 hours?​
Mathematics
1 answer:
Naily [24]3 years ago
8 0

Answer:

32

Step-by-step explanation:

you have to find how many min in a hour so 20 divided by 5 is 4 then 4x8 is 32

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PLEASE HELP!! if f(x)= 2x^2-11, find f(4)
Lemur [1.5K]

Answer: f(4) = 21

Step-by-step explanation:

2(4)^2-11

4^2 = 16

2(16)-11

Multiply 2 and 16

32 - 11

Subtract

21

4 0
3 years ago
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Choose the equation of the line that contains the points (1,-1) and (2,2)
natka813 [3]
(1,-1)(2,2)
slope = (2 - (-1) / (2 - 1) = 3/1 = 3

y = mx + b
slope(m) = 3
use either of ur points...(2,2)...x = 2 and y = 2
now we sub and find b, the y int
2 = 3(2) + b
2 = 6 + b
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so ur equation is : y = 3x - 4
7 0
3 years ago
Which expression represents 22 more than the difference between 95 and 63
SashulF [63]

Answer:

C

Step-by-step explanation:

Difference: 95 - 63

22 more: (95 - 63) + 22

6 0
3 years ago
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A social psychologist interested in cultural differences compared women of two ethnic groups on a Role Approval Index on which h
Levart [38]

Answer:

a. 5.26

Step-by-step explanation:

As, the standard deviation of the distribution of the difference between mean is 0.76 so the t score will be simply calculated by dividing the difference of means by standard deviation of the distribution of the difference between mean as hypothesized difference is zero.

t score=Xbar A- Xbar B/Sd of difference of means

t score=55-51/0.76

t score=4/0.76=5.26

3 0
3 years ago
Are these right? How do the parentheses make these two answers different?
oee [108]

yes it is correct

with parentheses you have to bring EVERYTHING INSIDE THE PARENTHESES to the given power but not if there are no parentheses

8 0
3 years ago
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