Homework Help: algebra 1

Posted by zamarra on Tuesday, January 15, 2013 at 12:33am.

A man drove 48 more miles an hour than the number of hours he drove. if he drove 208 miles in all, how many hours did he drive? What was his rate?

algebra 1 - Steve, Tuesday, January 15, 2013 at 12:11pm
if he drove x hours, his speed was x+48

distance = speed * time, so

(x+48)(x) = 208
x^2 + 48x - 208 = 0
(x-4)(x+52)
x=4

so, he drove 52 mph for 4 hours

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