Question

Evaluate the following expression using the values given:

Find 2r2 + 3s3 - r2 + 4t2 - r2 if r = -2, s = -3, and t = 5.

A. -19
B. -37
C. 27
D.19

Answer 1

first of all can you tell me the measure of these?
2r2 = ?
3s3 = ?
r2 = ?
4t2 = ?

Answer 2

2r2 = (2)r^2 = (2){(-2)^2} = 8
can you do the rest?

Answer 3

no im so confused

Answer 4

ok,we have the values of r,s and t and r = -2 so what is (2)r?

Answer 5

-4

Answer 6

well and now r^2 ?

Answer 7

^?