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3 years ago

A student solved z + (-0.72) = -2.5 for z using the

Mathematics

2 answers:

Firlakuza [10]3 years ago

7 0

Answer:

To solve, you must use the inverse operation. In step 1, -0.72 should have been subtracted from both sides, not added. Otherwise, 0.72 should have been added to both sides, not -0.72.

Step-by-step explanation:

N76 [4]3 years ago

5 0

Answer:

Mistake in step1

Step-by-step explanation:

<u>Given</u>

z + (-0.72) = -2.5

<u>Solving in steps</u>

1. ⇒ z + (-0.72) - (-0.72) = -2.5 - (-0.72)
2. ⇒ z = - (2.5 - 0.72)
3. ⇒ z = - 1.78

The student's mistake was adding (-0.72) instead of - (-0.72) or 0.72

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