MATH HELP!!!!!! PROPORTIONS!!!!!! EXPLAIN IF POSSIBLE!!!
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MATH HELP!!!!!! PROPORTIONS!!!!!! EXPLAIN IF POSSIBLE!!!

[From: ] [author: ] [Date: 11-05-16] [Hit: ]
This Does Not Compute!,......


Number 4 :

Given :

20/32 and 12/20
Tell whether the two ratios form a proportion and explain why :

Okay remember the Definition or a proportion

there two ratio that equal each other So let see if 20/32 = 12 /20

two ways to do this

1) reduce both fraction down to lowest common fractions

2) cross multiply it and divide it out

I will do this by # 2

20/32 = 12 /20

Cross multiply it like so

20 *20 = 12 *32

400 = 384

Oh boy we have a problem here they do not equal each other ( unlike 9/24 = 15/40 which is 9*40 = 15*24 which is 360 = 360 in the above problem )

let do it by # 1 :

20/32 = 12 /20 - Given equation

(20/4)/ (32/4) = (12/4)/ (20/4) - reducing the fraction down to lowest common fraction by dividing 4 to each part of the fraction

5/8 = 4/5 - Division

sorry! This Does Not Compute!, This Does Not Compute!, This Does Not Compute!,


So this not a proportion due the Definition of a proportion which those two ratio don't equal each other


Number 5


x – 2 1/3 = - 4 4/15

Slove for x

x – 2 1/3 + 2 1/3 = - 4 4/15+ 2 1/3

x = -4 4/15 + 2 5/15

x = -3 19/15 + 2 5/15 - Borrowing 1 and turning it to 15/15 and adding it 4/15 to get 19/15 for it

x = - 1 14/15 - Subtraction


Number 6 :

Given :

3 6/7x = 2 1/4 - original equation

solve for x

Step 1 :

3 6/7x = 2 1/4 - original equation

27/7 x = 9/4 - changing 3 6/7 and 2 1/4 to vulgar or improper fractions

7/27* 27/7 x = 9 / 4 * 7/27 - Multiplying the reciprocal of a coefficient to both sides of the equation to solve for d


x = 63/108 - multiplication

x = 7/12 - division or reducing the fraction down to lowest common fraction

Proof or check:

3 6/7x = 2 1/4 - original equation

27/7 x = 9/4 - changing 3 6/7 and 2 1/4 to vulgar or improper fractions
keywords: HELP,EXPLAIN,MATH,IF,POSSIBLE,PROPORTIONS,MATH HELP!!!!!! PROPORTIONS!!!!!! EXPLAIN IF POSSIBLE!!!
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