SOLUTION: Colored copies cost $.10 per copy and white copies cost $.5 per copy. Sandy made 400 copies, some of which were colored and the rest white. Her total bill was $22.50. How many c
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Question 130879This question is from textbook Prentice Hall Algebra I
: Colored copies cost $.10 per copy and white copies cost $.5 per copy. Sandy made 400 copies, some of which were colored and the rest white. Her total bill was $22.50. How many colored copies and how many white copies did she make?
This question is from textbook Prentice Hall Algebra I
Answer by checkley71(8403) (Show Source): You can put this solution on YOUR website!
C+W=400 OR C=400-W
.10C+.05W=22.50
.10(400-W)+.05W=22.50
40-.1W+.05W=22.50
-.05W=22.50-40
-.05W=-17.50
W=-17.50/-.05
W=350 WHITE COPIES.
400-350=50 WHITE COPIES.
PROOF
.10*50+.05*350=22.50
5+17.50=22.50
22.50=22.50
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