Finite math problem help!
Favorites|Homepage
Subscriptions | sitemap
HOME > Mathematics > Finite math problem help!

Finite math problem help!

[From: ] [author: ] [Date: 11-09-17] [Hit: ]
he sold x + 5 sets at 400.If you multiply each by the price,......
Sorry I am seriously stuck! help!
An application store sells a 15" tv for $280 and a 19" tv of the same brand for $400. During a one-week period the store sold 5 more 19'' tv's than 15'' tv's and collected $15,600. what was the total number of tv sets sold?

please explain step by step so i can i work on the other problems that are some what the same to this one THANK YOU

-
let x = number of tv sold at $280 and y = number of tv at $400.
During the sale week, he sold x + 5 sets at 400.
Total = x + y or x + (x + 5)
If you multiply each by the price,
280x + 400(x + 5) = 15600
280x + 400x + 2000= 15600
680x = 13600
x = 20 sets at $280
y = x + 5 or 25 sets at $400
Total of 45 sets sold

Proof
20 x $280 + 25 x $400 = $5600 + 10000 = $15600
1
keywords: problem,Finite,help,math,Finite math problem help!
New
Hot
© 2008-2010 http://www.science-mathematics.com . Program by zplan cms. Theme by wukong .