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Dovator [93]
3 years ago
7

Ronna answered 18 of the 20 questions on her second math test correctly. On the first test, she had answered only 15 of 20 quest

ions correctly. What was the percent increase in her score from her first test to the second test? A. 15% B. 35% C. 75% D. 90
Mathematics
1 answer:
lakkis [162]3 years ago
4 0

Answer:

A: 15%

Step-by-step explanation:

First test:

15 ÷ 20 = 0.75

0.75 * 100 = 75%

Second Test:

18 ÷ 20 = 0.9

0.9 * 100 = 90%

90% - 75% = 15%

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Zolol [24]

Answer:

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Begin with the right hand side:

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=========================================================

<u>Anther solution:</u>

To prove that ( sin θ cos θ = cot θ ) is not a trigonometric identity.

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