Friday
April 18, 2014

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.

http://cstl.syr.edu/FIPSE/Decunit/ratios/ratios.htm

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:
Answer:

Related Questions

chemistry - What volume at nitrogen would be required to react with 0.100g of ...
chemistry - What volume at nitrogen would be required to react with 0.100g of ...
chemistry - What volume at nitrogen would be required to react with 0.100g of ...
writing - I would like to write about the death of my brother but I need to come...
Math - I need help to set the equation up to solve a system to ensure that I get...
Algebra - I am helping my daughter with her algebra and we came across a symbol ...
algebra - Need help with this one write an explicit formula for the sequence 1/2...
Repost Repost Bio - I asked this, and didn't get a very helpful response. ...
math - the radius of circle c is 16 units long. find the lenght of an arc that ...
Chemistry - a solid mixture is 3.00 grams and 65.0% NiCO3. How much nickel ...

Search
Members