Question

A grocer has two kinds of candies, one selling for 90 cents a pound and the other for 40 cents a pound. How many pounds of each kind must he use to make 100 pounds worth 85 cents a pound?

Answer 1

Oh it's simple...! I know the method... See if you can substitute the numbers. And if you can't then please just get back to me....


Given:Candy x = 0.90 per pound Candy y = 0.40 per pound
100 pounds * 0.85 per pound = 85
x + y = 1000.90x + 0.40y = 85
x = 100 - y
0.90(100 - y) + 0.40y = 8590 - 0.90y + 0.40y = 85-0.50y = 85 - 90y = -5 / -0.50y = 10
x = 100 - yx = 100 - 10x = 90
0.90x + 0.40y = 850.90(90) + 0.40(10) = 8581 + 4 = 8585 = 85
Substitute your answer please....
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