Solve the problem.
-A bag of marbles has twice as many blue marbles as green marbles, and the bag has at least 36 marbles in it. At least how many green marbles does it have?
A) At least 24 green marbles
B) At least 13 green marbles
C) At least 18 green marbles
D) At least 12 green marbles

Question

Quizplus · Accepted Answer

Let the number of green marbles be x. Then the number of blue marbles is 2x. The total number of marbles is x + 2x = 3x. Since the bag has at least 36 marbles, 3x ≥ 36. Solving for x gives x ≥ 12. Therefore, there are at least 12 green marbles.

Solve the Problem. -A Bag of Marbles Has Twice as Many Blue Marbles