Thursday

July 31, 2014

July 31, 2014

Posted by **Anonymous** on Wednesday, November 14, 2007 at 1:24pm.

- math -
**Phillip**, Wednesday, November 14, 2007 at 3:38pm21/5 x 10/21 x 9/20. You can multiply all the numerators (top numbers) and then all the denominators (bottom numbers), then simplify. However,it is much easier to simplify before multiplying. To do this, find a number that will divide evenly into any numerator and any denominator. There is a 21 for a num. and a 21 for a den. so 21/21 = 1. Now you have 1/5 x 10/1 x 9/20. You have a 5 in a den and a 10 in a num so you could divide out the common 5 which is 1/1 x 2/1 x9/20.( Or you could look at the num 10 and the den 20 - dividing out the common 10. It does not matter which num and den you use as long as they have a common factor and are not both num or both den.)In 1/1 x 2/1 x 9/20, there is a common factor of 2 that can be divided into the num 2 and the den 20 leaving 1/1 x 1/1 x 9/10. Now multiplying all num then all den gives you 9/10. This is much easier to see when you write it on paper. If you don't understand let me know

**Related Questions**

Algebra - Can you please check my work? You have helped other students I know. ...

Algebra (check my answers) - Please check these answers. Multiply -7(2a2 -4) = -...

Math - Multiply and Simplify: (a^x-a^(-x))^3 =(a^x-a^(-x))(a^x-a^(-x))(a^x-a^(-x...

Math 116 Axia - rewrite using multiplication -70/(23) Do not simplify, Type a ...

Simplify (Another Question/problem) 3 - Simplify. (27a^(-6) )^(-2/3) I got 1/(9a...

MATH - How do you write fractions in simplest form? for example I need ...

math problem - please help Simplify Multiply (27-42)(57+102)

Math Problem - please help simplify Multiply (6x+1)(7x^2+5x+4)

someone help - my post is still on this page as algebra, could someone elaborate...

math - how do i do x2+12x+32 x2+12x = 14x+32 subtract 14x from each side 14x=32 ...