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Aneli [31]
3 years ago
10

Emily earned a grade of 80% on a math test that had 20 problems. How many problems on this test did she answer correctly? If Joh

n got 7 problems incorrect on the same test, what was his grade?
Mathematics
2 answers:
Oxana [17]3 years ago
7 0
Someone getting all 20 problems correct would earn a grade of 100%.  Thus, each correct question counts 5%.

If Emily earned 80%, then the number of problems she got correct was (80% / 100%).

Simplify this result.  It represents the fraction of 20 questions that Emily got correct.  Multiply your result by 20 to find the actual number of questions that E. got correct.
galben [10]3 years ago
4 0
0.8*20 = 16 problems answered correctly
If John got 7 problems wrong, then he got 14 problems right.
14/20 = 0.7
Now, convert 0.7 into a percentage.
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Show all of your work. Simplify the expression: - 3a + 7 + 5a​
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Step-by-step explanation:

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Step-by-step explanation:

<h2><em><u>6</u></em><em><u>x/</u></em><em><u>3</u></em><em><u>=</u></em><em><u>2</u></em><em><u>x</u></em></h2>

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8 0
3 years ago
Identify the middle line for the function: f (t) = 5sec(3t − π) + 1
sergiy2304 [10]
Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.

<span>(t) = 0 gives
</span><span>-24t + 60 = 0
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6 0
4 years ago
4 pts
Aliun [14]

Answer:

17

Step-by-step explanation:

So, this is a percentage problem.

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And that's the answer!

5 0
3 years ago
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