camarianascottoydqpq camarianascottoydqpq

15-11-2017
Mathematics

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Lilli jogs 1/2 mile in 1/10 hour.

What is Lilli's rate in miles per hour?

(A) 5
(B) 1/20
(C) 1/5
(D) 20

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texaschic101 texaschic101

15-11-2017

(1/2) / (1/10) = x / 1.....1/2 mile to 1/10 hr = x miles to 1 hr
cross multiply
(1/10)(x) = (1/2)(1)
1/10x = 1/2
x = (1/2) / (1/10)
x = 1/2 * 10
x = 10/2
x = 5 <=== 5 miles per hr

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