Question

Evaluate: 7 z +negative z , when z = 4.

A. 24
B. 0
C. -112
D. -7

Answer 1

when you add a negative you subtract
so 7z + (-z) = 7z - z = 6z
then plug in 4 for z
so 6z = 6(4) = 6 times 4 = ?

Answer 2

use a calculator :P

Answer 3

yeah, just copy paste XD
http://www.wolframalpha.com/input/?i=7+z+%2Bnegative+z+%2C+when+z+%3D+4

Answer 4

6 * 4 = ?
24

Answer 5

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Answer 15

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B.x^3+0x^2+2x+sqrt2
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E. x^-2+x+1

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