AnswersAZ-Algebra 2A MA301Cumulative Exam — Cumulative examQuestion 47
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Cumulative Exam — Cumulative exam

Question 47 • AZ-Algebra 2A (MA301)

Read the word problem below.Antonio has a total of 55 marbles. He has 15 green marbles and 12 red marbles. The rest of the marbles are blue. How many blue marbles does he have? A student represents the number of blue marbles as the variable b and solves this problem by writing an equation. Which strategy could help check the student’s answer?

Answer
A
Check that the sum of b, 12, and 15 is 55.
B
Check that the difference of 55 and b is 12.
C
Check that the sum of the b, 27, and 15 is 55.
D
Check that the difference of 55 and b is 15.

Explanation

The marbles total 55, and they are divided into blue, red, and green marbles. So the student’s answer for b should make b + 12 + 15 equal 55. This is choice A, “Check that the sum of b, 12, and 15 is 55.”

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