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yuradex [85]
3 years ago
11

When Miguel does 16 push-ups and 12 sit-ups, it takes a total of 72

Mathematics
2 answers:
antoniya [11.8K]3 years ago
8 0

Answer:

4.5 or 5.2

approximately 5

Step-by-step explanation:

since \: it \: took \:  \\ 72 \: seconds \: to \: do \: 16 \: push \: ups \\ 72 \div 16 = 4.5  \: approximately \:  \\  = 5  \: seconds\: per \: push \: up \\ 2nd \: comparison \:  \\ 57 ÷ 11 =  \\ 5.8111111  \\  = 5.2(to \: 1 \: decimal) \\ approximately \: \\  5  \\  \: so \: it \: takes \: 5 \: seconds

Mars2501 [29]3 years ago
5 0

Answer:

about 3 seconds

Step-by-step explanation:

hope this helps

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0.9 of Karen's Science score is equal to 0.75 of her Math score and 0.8 of her Chemistry score. Given that Karen scored 96 marks
DochEvi [55]

You have to formulate equations for this problem.

Let S = Science score

      M = Math score

       C = Chemistry score

To illustrate the given:

0.9S = 0.75M

0.9S = 0.8C

You are given that Karen’s Math score is 96 marks. You have to substitute the Math score to the first equation.

0.9S = 0.75(96)

0.9S = 72

S = 80

Therefore, Karen’s Science score is 80. Now, you have to substitute the Science score to the second equation.

0.9(80) = 0.8C

0.8C = 72

C = 90

So, Karen’s Chemistry score is 90.

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4 years ago
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