Simple Maths question, need help
Favorites|Homepage
Subscriptions | sitemap
HOME > Mathematics > Simple Maths question, need help

Simple Maths question, need help

[From: ] [author: ] [Date: 11-08-14] [Hit: ]
but I get 65.Please show working. Thanks.-Let x = the original price of the DVD player before tax.Then, x + .......
DVD player costs 91.30 including 10% tax.
The player is 20% off the original price.
How much do you pay after the discount AND if you are exempt from the tax.

The answer is $66.40 according to my answer sheet, but I get 65.74

Please show working. Thanks.

-
Let x = the original price of the DVD player before tax.

Then, x + .10x = 91.30, since 10% of the price translates to .10x.

This gives the equation 1.1x = 91.30, so x = 83.

20% of x is .20x, so .20*83 = 16.60 is the discount.

So, 83 - 16.60 = 66.40, the price after discount and tax exemption.

-
original *1.10 = 91.30

original = 91.30/1.1 = 83

83*.8 = 66.40
1
keywords: Simple,Maths,help,need,question,Simple Maths question, need help
New
Hot
© 2008-2010 http://www.science-mathematics.com . Program by zplan cms. Theme by wukong .