Posted by Lauren on Sunday, October 14, 2012 at 4:50pm.
Ahh -- ratios and proportions are soooo useful!
7/10 = 17.5/x
Cross multiply.
7x = 10 * 17.5
Solve for x.
7x = 175
x = 175/7
x = 25
this is how I solve, seems totally wrong.
(17.5*7)/10 = x
122.5/10 = x
12.25 = x
x = 12.25
First, you could see it's wrong. Since 7 is less than 10, then 17.5 must be less than x.
Study this site, especially Method 1 under Solutions.
http://www.regentsprep.org/Regents/math/ALGEBRA/AO3/Lprop.htm
thank you Ms.Sue :)
Oh i see, thank you for the link, that helps a lot.
You're welcome.
Related Questions
math - What is the solution to the proportion shown below? (x+3)/4 = (x+2)/3
math - What is the solution to the proportion shown below? (x+3)/4 = (x+2)/3
Math - What is the solution to the proportion shown below? (x+3)/4 = (x+2)/3
Chemistry - The Ka values of H2CO3 are shown below. Ka1 4.6 10-7 Ka2 4.4 10-11 ...
7th grade math - 10-3y=1 find the value of y
MAth! - In the list of five measurements shown below, one is blurred. Supply a ...
statistics - Dr. Snyder teaches a large introductory statistics course. In the ...
math - What is the value of p in the proportion below? 1/3 = P-2/p+8
Math - If a grade was drawn at random from the data shown below, what is the ...
8th grade math - 1. The area shown below will be used for the elementary school ...
For Further Reading
