+0  
 
+1
65
3
avatar

A street vendor sells two type of newspapers, one for $0.25 and the other for $0.40. If he sold 100 newspapers for $28.00, how many did he sell at $0.25?

 Apr 7, 2020
 #1
 #3
avatar+111329 
+1

Thx, Cal   !!!!

 

 

cool cool cool

CPhill  Apr 7, 2020
 #2
avatar+111329 
+2

Let N  be  the  number  of newspapers  sold  at 25 cents

Then 100 - N  is  the  number sold at 40 cents

 

Then

 

number sold at 25 cents * price each +  number sold at 40 cents *  price each  = 28

 

N * .25  +   (100 - N) * .40  =  28     simplify

 

.25N + 40 - . 40N  =  28

 

-.15N + 40  = 28   subtract 40 from both sides

 

-.15 N = -12     divide both sides by -.15

 

N = 80 at 25 cents

 

 

cool cool cool

 Apr 7, 2020

13 Online Users

avatar