Question 2 Answer & Explanation - SAT Algebra

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algebra

The sum of three consecutive multiples of 5 is 75. What is the middle number?

Correct Answer: B

Choice Bhoice C is the correct answer.

Define: $x, x+5, x+10$ .
Equation: $3x + 15 = 75$
Subtract 15: $3x = 60$
Divide by 3: $x = 20$
Middle: $20 + 5 = 25$

Choice Bhoice D is incorrect because this is the smallest.

Choice Bhoice D is incorrect because this is the largest.

Choice Bhoice A is incorrect because calculation error.

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