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OpenStudy (anonymous):
Evaluate: 7 z +negative z , when z = 4. A. 24 B. 0 C. -112 D. -7
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jigglypuff314 (jigglypuff314):
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 = ?
OpenStudy (anonymous):
use a calculator :P
jigglypuff314 (jigglypuff314):
yeah, just copy paste XD http://www.wolframalpha.com/input/?i=7+z+%2Bnegative+z+%2C+when+z+%3D+4
OpenStudy (anonymous):
6 * 4 = ? 24
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