Question

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

Answer 1

what are you having trouble with?

Answer 2

you substitute the values given for the appropriate variable then follow PEMDAS

Answer 3

Substitute what values?

Answer 4

x = -2, y = 3, and z = -2

Answer 5

the numbers are values

Answer 6

Ohh okay 1 sec

Answer 7

is it 9?

Answer 8

no, first just sub the values and rewrite the full expression with the x y z

Answer 9

i mean without the x y z

Answer 10

you can rewrite it here

Answer 11

do u understand what im asking?

Answer 12

4(-2) - 3 - 2(-2)

Answer 13

exactly! now do you know how to solve that?

Answer 14

I do the ones in parentheses first right?

Answer 15

well parentheses come first, but here what is inside the parentheses is just a number, there nothing to do in there. so you actually do multiplication first. 4(-2) is just another way, a more clear way, of saying 4 * -2

Answer 16

I did that and I got 8 - 3 - -4

Answer 17

4 * -2 actually equals -8

Answer 18

Ohhhhh whoops

Answer 19

whenever you multiply a negative and a positive the answer is always negative

Answer 20

Oh so it';s -7?

Answer 21

boom! nice job

Answer 22

Haha, thanks!

Answer 23

:) good luck