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umka21 [38]
3 years ago
10

Someone please help me I’ll give out brainliest please dont answer if you don’t know

Mathematics
1 answer:
geniusboy [140]3 years ago
7 0

Answer:

3

Step-by-step explanation:

Plug -1 into 8x² - 5

8 (-1)² - 5 =

8 * 1 - 5 =

8 - 5 =

3

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42 = -7 (z - 3)<br><br> z = ?
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Answer:

The answer to your question is z = -3

Step-by-step explanation:

Expand                 42 = -7(z - 3)

                             42 = -7z + 21

Simplify                 7z = -42 + 21

                             7z = -21

Clear z                    z = \frac{-21}{7}

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