anonymous one year ago 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

1. MichaelAlex292

Input the values in the equation:$4(-2) - (3) - 2(-2)$ And then solve

2. anonymous

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

3. MichaelAlex292

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

4. anonymous

oh thanks!

5. MichaelAlex292

No problem

6. anonymous

can you help with another one?

7. MichaelAlex292

Ok, but let me see it first

8. MichaelAlex292

What class are you taking btw?

9. anonymous

Evaluate the following: −3 − (−8). 5 −5 −11< wouldnt it be this? −18

10. anonymous

algebra 1

11. MichaelAlex292

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?

12. anonymous

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

13. MichaelAlex292

Yep, he's right

14. anonymous

so 5?

15. MichaelAlex292

Yes