SOLUTION: Okay...John Dashwood recieved a 75cent/h raise for his part ime job. He can now eard his former weekly salary of $63 working 2 h less. How many hrs. a week did he work before he r
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Question 121895This question is from textbook
: Okay...John Dashwood recieved a 75cent/h raise for his part ime job. He can now eard his former weekly salary of $63 working 2 h less. How many hrs. a week did he work before he recieved his raise?
This question is from textbook
Answer by scott8148(6628) (Show Source): You can put this solution on YOUR website!
let x="old hours" and y="old pay rate" __ xy=63 __ y=63/x
with raise __ (x-2)(y+.75)=63
substituting for y __ (x-2)((63/x)+.75)=63 __ 63+.75x-(126/x)-1.5=63
multiplying by x __ 63x+.75x^2-126-1.5x=63x __ .75x^2-1.5x-126=0
multiplying by 4/3 __ x^2-2x-168=0
factoring __ (x-14)(x+12)=0
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