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bezimeni [28]
3 years ago
6

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:

15

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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