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

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

fibonaccichick666 · Answer

so, can you re-write the expression with your values subbed in?

anonymous · Answer

$$2r^2 + 3s^3 - r^2 + 4t^2 - r^2 $$

anonymous · Answer

$$2(-2)^2 + 3(-3)^3 - (-2)^2 + 4(5)^2 - (-2)^2$$

anonymous · Answer

and a calculator
this is like the sixth time i have seen this exact same question in past two days
maybe the seventh

anonymous · Answer

I don't see how people can just put in the numbers where the variables are, and actually use their brain to find the numbers that represent that variable, and then just plug it in, and solve the equation.... Apparently math is getting too hard.

fibonaccichick666 · Answer

common core has destroyed math

ashy98 · Answer

im still trying to fine the answer @FibonacciChick666

fibonaccichick666 · Answer

ok, just show your work here and we can make sure you are doing it right

anonymous · Answer

i would use a calculator if it was me
with judicious use of parentheses

anonymous · Answer

You can even use a computer calculator. Every computer has one. Just go to the Home button and type search for calculator.

ashy98 · Answer

127? @satellite73

anonymous · Answer

Ok either you're very very dumb, or you just don't know how to use a scientific/graphing calculator...
Your equation has $$2(-2)^2+3(-3)^3-(-2)^2+4(5)^2-(-2)^2$$
Now if you look carefully.. There is a $$3(-3)^3$$ (Hint: This part is being cubed instead of squared!)