Answer:
D
Step-by-step explanation:
If you multiply 3 and 7 you are saying she worked 21 hours when she only worked a total of 10 hours.
The simplest form of the given expression is 5x^3-5x^2.
We have given that

We have to determine the simplest form of the given expression.
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What is the distributive property?</h3>
The distributive property of binary operations generalizes the distributive law, which asserts that equality is always true in algebra. elementary.
Use the distributive property we get,

Add like terms we get,
Therefore we get,

Therefore the simplest form of the given expression is 5x^3-5x^2.
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<em>first:</em>
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<em>So the first is the correct one.</em>
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Hope I helped you!</em></h3><h3><em>
Success!</em></h3>
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<em>by a romanian guy.</em>
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Answer:
1) 133⅓ %
2) 112½ %
Step-by-step explanation:
1) 2 years = 2×12 = 24 months
24/18 × 100 = 133.33%
2) 225mm = 225/10 = 22.5 cm
22.5/20 × 100 = 112.5%