Math- Weighted Average

A cheetah is 300 feet from its prey. It starts to sprint toward its prey at 90 feet per second. At the same time the prey starts to sprint at 70 feet per second. When will the the cheetah catch the prey?

Can you please provide an explantaion?
Thanks

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1. This has nothing to do with weighted average.

They run the same time, and the cheeta runs 300 feet further.
prey distance=70t
so
70t=90t-300, right?

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bobpursley
2. How many quarts of pure orange juice should Mike add to a 10% orange drink to create 6 quarts of 40 % orange mix juice. Let p represent the number of quarts of pure ornage juice he should add to the orange drink.

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