3 years ago

A student who correctly answered 60 questions a test received a score of 75%. How many questions were on the test

1 answer:

7 0

It would be 45 you take 60 x 75%

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Archy [21]

We can't find explicit values for $x$ and $y$ , since there is only one equation, but two variables.

The best we can do is solve for one variable with respect to the other:

Solve for $x$ :

subtract $5y$ from both sides:

$110-5y = 9x$

divide both sides by $9$ :

$\frac{110-5y}{9} = x$

Solve for $y$ :

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sleet_krkn [62]

Plug in 5 into x.

f(5)=5(5)-3

25-3

f(5)=23

Your answer is 23.

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