April 19, 2015

Homework Help: please help

Posted by chrissy on Wednesday, August 1, 2007 at 4:49pm.

oook that site didnt help much I dont need to know how to suck up to my teacher. I need to know how to set up a ratio, can someone help me??

The format for ratios is # : # :: # : #

Example 1: 2 :: 2 : ?

1 is one half of 2... so 2 would be one half of ? Four , of course.

Chrissy, here is an excellent site on how to set up ratios.

thank you ok that sounded simple. but is it always one half of a number or..can you give me an example or a problem and solve it out???

oooo thanks for the site. it will help me alot!

I'm sorry, the site I thought I posted wasn't the same one that was posted.

GuruBlue has given you an excellent site.

The problem you had stated that 2 inches on the blueprint equals 5 feet in the actual room. The problem asks the length of the actual measurement when it's 7 1/2 inches long on the blueprint. Here's the ratio I set up:

2 inches is to 5 feet as 7 1/2 inches is to x (the actual length).

This is shown as:
2 / 5 as 7 1/2 / x

We cross multiply the top of the first fraction with the bottom of the second fraction.
2x = 5 (7 1/2)
2x = 37.5
x = 18.75 = 18 3/4

Answer this Question

First Name:
School Subject:

Related Questions

year 8 re-Re teachers - i posted this question before but can`t see it on the ...
fine arts - i need to find two masks of the americas and oceania or the africas...
science - My science teacher gave me a site to go to and it would do the ...
adult education - I need help with someone to go over my eassy with me can ...
geometry circles equation i dont know - please he lp Find the equation of a ...
Science math - Can no one help me? I posted a question earlier I don't need ...
algebra - Need help with this one write an explicit formula for the sequence 1/2...
math - the radius of circle c is 16 units long. find the lenght of an arc that ...
science - I have checked these sites out and they dont answer the question, what...
Forgot my book, need science help!! - Please help me I have a whole section to ...