Solve the problem.
-A bag of marbles has twice as many blue marbles as green marbles, and the bag has at least 42 marbles in it. At least how many green marbles does it have?
A) At least 15 green marbles
B) At least 21 green marbles
C) At least 14 green marbles
D) At least 28 green marbles

Question

Quizplus · Accepted Answer

Let the number of green marbles be $g$ and blue marbles be $2g$. The total number of marbles is at least 42, so $g + 2g \geq 42$, which simplifies to $3g \geq 42$. Solving for $g$, we get $g \geq 14$. Therefore, there are at least 14 green marbles.

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