February 23, 2017

Homework Help: Algebra

Posted by Jon on Saturday, February 16, 2008 at 11:40am.

The five fastest roller coasters in the world Fujiyama(Japan), Goliath(CA), Millenium Force(OH), Steel Dragon 2000(Japan), and Superman the Escape(CA). The speeds, in mph, of the first four coasters are 83,85,92,and 95, respectively. How fast can Superman the Escape travel if the average speed of all five coasters is no more than 91 mph?

A)no more than 100 mph
C)at least 100 mph

I think it's A b/c 83+85+92+95+100/5 = 91 mph. it cant be C b/c it says "at least" 100 which means it can go faster than 100 so the answer is A.

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