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4 years ago

what expressions represent the phrase "twice the sum of a number and 5"? A)2×+5, B) 2 (5)+×, C) 2 (×+5), D) (×+5)^2

Mathematics

1 answer:

Ivanshal [37]4 years ago

6 0

The answer will be c, 2(x+5)

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<u>Answer:</u>

The grade you make on your exam varies directly with the number of correct answers. The constant of variation is 5

<u>Solution:</u>

Given, The grade you make on your exam varies directly with the number of correct answers you get on the exam.

Answering 15 questions correctly will give you a grade of 75 what is the.

We have to find what is the Constant of variation.

Now, according to the given information, grade  number of correct answer

Then, grade = c x number of correct answers, where c is constant of variation.

Now, substitute grade = 75 and number of correct answers = 15

$\text { Then, } 75=c \times 15 \rightarrow c=\frac{75}{15}=5$

Hence, the constant of variation is 5

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