SOLUTION: Sales: A dealer bought some radios for a total of $1200. She gave away 6 radios as gifts, sold each of the rest for $10 more than she paid for each radio, and broke even. How ma
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Question 129212This question is from textbook Beginning & Intermediate Algebra
: Sales: A dealer bought some radios for a total of $1200. She gave away 6 radios as gifts, sold each of the rest for $10 more than she paid for each radio, and broke even. How many radios did she buy?
This question is from textbook Beginning & Intermediate Algebra
Answer by scott8148(6628) (Show Source): You can put this solution on YOUR website!
let x="radios bought"
(x-6)((1200/x)+10)=1200
multiplying by x and dividing by 10 __ (x-6)(120+x)=120x __ x^2+114x-720=120x
__ x^2-6x-720=0
factoring __ (x-30)(x+24)=0
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