Answer:
A) 7.24 hours
Step-by-step explanation:
The together rate is the sum of each separate rate.
In this problem:
Beth's rate is 1/15(suppose there was a small typing mistake there, with 151 none of the options are correct).
Mike's rate is 1/14
The together rate is 1/x
Then
We want to find x.

15*14 = 210. So


Cross multiplication



So the correct answer is:
A) 7.24 hours
Answer:
(C) 100
Step-by-step explanation:
The average of a data set is just all the numbers added up divided by the amount of numbers.
If we already have 4 pieces of data and we're looking for one more, we have 5 data pieces.
This means that the sum of all of the numbers in the data set will be
if the mean is 91.
We can find the missing value by adding up what we know and subtracting from 455.

So Abby needs a 100% on her fifth history quiz to have an average of 91 on all her quizzes.
Hope this helped!
Answer:
4z4−6z3−2z2−20z+1
Step-by-step explanation:
4z5−14z4+10z3−16z2+41z−2
z−2
=
4z5−14z4+10z3−16z2+41z−2
z−2
=
(z−2)(4z4−6z3−2z2−20z+1)
z−2
=4z4−6z3−2z2−20z+1
(theres no more like terms so u cant)
The perimeter equation for a rectangle is two times the base plus two times the height.
2B + 2H=P
Plug in the known values and solve for x.
2(2x) + 2(x+1)=53
4x+2x+2=53
6x=51
x=8.5
Now that we know what x is, put it back into the formula for the height of the rectangle to find the final answer.
H= x+1
H=8.5+1
H=9.5 ft