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Tim and Cynthia leave Cynthia's house at the same time. Tim drives north and Cynthia drives west. Tim's average speed is 10mph
10
⁢
mph
slower than Cynthia's. At the end of one hour, they are 70
70
miles apart. Find Cynthia's average speed. (Round your answer to the nearest tenth.)
2 years ago

Answers

oobleck
If Cynthia's speed is x mi/hr, then we have
x^2 + (x-10)^2 = 70^2
now just find x
2 years ago

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