Which pair of
expressions are
equivalent?
A. 8(2r) and 10r B. 6r + 3 and 9r
C. 9(3r-4) and 27r - 36
D. r+r+r+r+r and r^5

Well...

A.

8(2r)       &     10r

This is incorrect because the second option would be if you added 8r to 2r, not multiplied 8 to 2r.

B.

6r + 3     &     9r

This is incorrect because you cannot add the 3 to 6r, because they are different.

C.

9(3r-4)    &     27r - 36

This is correct because the two options are equivalent.

D.

r+r+r+r+r &     r^5

This is incorrect because the first part would need to be r x r x r x r x r for it to be true.

yw.

answer: the first one

step-by-step explanation: use a calculator and divide the minutes by the dollars.

54

step-by-step explanation: