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.

Algebra - bobpursley, Saturday, February 16, 2008 at 12:04pm
5*91>(84+85+92+95+S)

455>356+S
99>S

So the answer is in the above: Superman cannot be going 99 or faster.

check my thinking.
Algebra - Jon, Saturday, February 16, 2008 at 12:21pm
if the average speed of ALL 5 coasters is no more than 91 mph then that last coaster has to be 100 mph to reach a speed of 91 on average. if superman goes at 99 then the average would be only 90.8
Algebra - Jon, Saturday, February 16, 2008 at 12:23pm
if it's at 100, the average would be 91 exactly

Answer this Question

Related Questions

algebra - Superman the Escape in CAlifornia is the fastest roller coaster in the...
US history - After dropping two atomic bombs on Japan, the United States: 1. ...
History - I have to write an essay on the drop of the atomic bomb on japan in ...
Math - One of the world's fastest roller coasters is located in a theme park...
japan - Never since the war begins has there been such a week of dramatic and ...
Sociology - Did I choose the correct answer #3 In the mid- to late 1880s, the ...
Global History - This concerns the feudal powers in Japan: Ok, so in many ways ...
English - 1. Korea co-hosted the World Cup in 2002 with Japan. 2. Korea hosted ...
AP Macroeconomics - Japan, the European Union, Canada, and Mexico have flexible ...
critical thinking - utilizing the seven factors of the utilitarian calculus ...

For Further Reading

First Name:
School Subject:
Answer: