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yulyashka [42]
3 years ago
6

Deanna gets 3 problems incorrect on her math quiz and scores 85%. How many questions were on the quiz?

Mathematics
1 answer:
katrin2010 [14]3 years ago
5 0

Answer:

There were 20 questions on the quiz

Step-by-step explanation:

In this question, we are concerned with knowing the number of questions on a quiz, given that Deana had a certain percentage after scoring an amount of marks.

We proceed as follows;

Let the number of questions on the quiz be X.

Now, she got 85% by making 3 incorrect choices. This means the percentage of questions she got incorrectly would be 100-85 = 15%

what we are saying is that it is just 15% of her questions that were wrong.

This mathematically;

15% of x = 3

15/100 * x = 3

15x = 3 * 100

15x = 300

x = 300/15

x = 20

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2 years ago
Can you conclude from the figure that ABC is similar to DEF? Explain.​
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Yes, we can conclude that Triangle ABC is similar to triangle DEF because the measures of the 3 angles of both triangles are congruent.

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We have the measure of 2 angles from both triangles, and we know that triangles have 180°, so we can solve for the measure of the third angle for both triangles.

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3 years ago
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A certificate of deposit earns 1% interest every three months. The interest is compounded.
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6/42 in simplest form
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6/42 in simplest form :

Divide both the nominator and the denominator by the HCF (highest common factor) : 6

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