Question

Evaluate the following expression using the values given.
Find 4x - y - 2z if x = -2, y = 3, and z = -2



I got 9 for my answer, but the choices are:
A. -15
B. 15
C. -7
D. 7

Answer 1

Did you substitute the values correctly?

Answer 2

I did.

Answer 3

Can you show your working? I didn't get 9

Answer 4

since
x= -2
y= 3
z= -2

I put that into the equation:
4(-2) - (3) - 2- (-2)
from there, I multiplied, and subtracted the numbers. I got 9...

Answer 5

4(-2) - 3 - 2(-2) not 4(-2) - 3 - 2 - (-2)

Answer 6

I typed that wrong, in my work, that's the equation I had... I still got 9

Answer 7

4(-2) - 3 - 2(-2) = -8 - 3 + 4 = -11 + 4 = -7

Answer 8

i didn't combine the -8 and -3. thank you so much.