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____ [38]
3 years ago
5

I need help with this equation please

Mathematics
1 answer:
pychu [463]3 years ago
6 0
What equation please tell me
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in a test consisting of 90 questions, Ama answered 75% of the first 40 questions correctly. If she had to get a score of 80% in
Shalnov [3]

Answer:

total question =90

she obtained 75% of first 40 questions

  1. No. of question she got correct in first 40 = 75% * 40 = 30

2. in order to get 80% out of 90,

the no. of questions got correct by Ama = 80% * 90 = 72

3. As she already got 30 c0rrect in first 40 questions, the number of question she needs correct for remaining 50 = (72-30) = 42

percentage = 42/50*100% = 84%

3 0
3 years ago
The length of a rectangle is three times its width. The perimeter of the rectangle is 100 inches. What are the dimensions of the
ser-zykov [4K]

Answer:

We have l = 2w and 2l + 2w = 100 inches;

Then 4w + 2w = 100 inches;

6w = 100 inches;

w = 16.6;

l = 3 x 16.6;

l = 49.8 inches;


Step-by-step explanation:


7 0
3 years ago
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How do you subtract 42 minutes from 1 hour 25 minutes? explain what to do and why to do it.
ikadub [295]

Answer:

43

Step-by-step explanation:

you change the 1 hour into minute you and 60min to 25 minutes and then you subtract from 42 minutes to get the solution

8 0
3 years ago
A German shepherd puppy weighed 25 pounds at 4 months old and 31 pounds at 5 months old. What is the percent increase or decreas
Luden [163]
It is a percent decrease because the original is less than the final value and the answer is -24% decrease. Please give me brainless if right.
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3 years ago
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Zahra gave out a survey to some students in her school about their favorite color. Students could choose between purple and red.
Alexandra [31]

Answer:

45

Step-by-step explanation:

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2 years ago
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