Question 2 Answer & Explanation - SAT Algebra

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algebra

A student has grades of 80, 85, and 90. What must she get on the 4th test to average 88?

100

Correct Answer: C

Choice Choice D is the correct answer.

Equation: $\frac{80 + 85 + 90 + x}{4} = 88$
Sum: $255 + x = 352$
Subtract 255: $x = 97$

Choice Choice B is incorrect because calculation error.

Choice Choice D is incorrect because calculation error.

Choice Choice A is incorrect because calculation error.

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Linear Functions Set 34

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