The ratio of red marbles to blue marbles in a jar is 3 to 8. There are 40 blue marbles in the jar.

Mathematics

2 answers:

ddd [48]3 years ago

7 0

Answer:

Step-by-step explanation:

Pie3 years ago

3 0

_red_ = _3_ (set up problem)
blue 8

blue=40 R=red (define terms)

_ R_ = _3_ (cross multiply)
40 8

8R=120 (divide by 8 on both sides)

R=15

The answer is B.15

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