Question

Evaluate the expression, using the given value of the variable.



z ÷ 4 – 8z + 2(z – 5) when z = 12

Somehow I always get either 5757 or -5757, Help me solve please!

Answer 1

Replace every copy of z with 12 (since z = 12) and then evaluate to get

z ÷ 4 – 8z + 2(z – 5)

12 ÷ 4 – 8(12) + 2(12 – 5)

12 ÷ 4 – 8(12) + 2(7)

3 – 8(12) + 2(7)

3 – 96 + 14

-93 + 14

-79

Answer 2

So that means z ÷ 4 – 8z + 2(z – 5) = -79 when z = 12

Answer 3

That's what I've been doing though, But I must be doing something wrong because I tried Solving it again and I still got 5757 ;-; @jim_thompson5910

Answer 4

Write out the steps you have so far

Answer 5

Sorry i was looking at it wrong jim is right

Answer 6

Wait, I got it ^.^ or at least I think I did, when I get to the end of the lesson ill go back and see, thanks for helping! @jim_thompson5910 @Awesome94621

Answer 7

you're welcome