Question

please help!
Evaluate the following expression using the values given:

Find 4x − y − 2z if x = −2, y = 3, and z = −2

−15< I thought it was this, but its not...
15
−7
7

Answer 1

Input the values in the equation:\[4(-2) - (3) - 2(-2)\]
And then solve

Answer 2

I did.. I solved it, and I thought I solved it correctly... I even wrote the problem like that!

Answer 3

Hmmm, let's see:\[(-8 ) - 3 = -11\]
\[-11 + 4 = -7\]
Remember that -2 times -2 is +4, so -7 is the answer

Answer 4

oh thanks!

Answer 5

No problem

Answer 6

can you help with another one?

Answer 7

Ok, but let me see it first

Answer 8

What class are you taking btw?

Answer 9

Evaluate the following: −3 − (−8).

5
−5
−11< wouldnt it be this?
−18

Answer 10

algebra 1

Answer 11

Oh ok, so for this equation, this is what it looks like:\[-3 + -1(-8)\]
When you have a negative sign right before the parentheses, it can be shown like above. Now can you solve it?

Answer 12

Think of it like this \[\large (-3)+(-1(-1 \times 8)\] The two -1's cancel out leaving you with \[\large -3+8\]

Answer 13

Yep, he's right

Answer 14

so 5?

Answer 15

Yes