Homework Help: math

Posted by Anonymous on Wednesday, January 19, 2011 at 2:36pm.

ee ann wants to mix tea with 2 Cents per oz with 100oz of tea worth 5 cents per oz to make a mixture worth 3 cents per oz. how much 2 cent tea should be used?

math - helper, Wednesday, January 19, 2011 at 3:20pm
x = number oz of cheaper tea
.02x = value of cheaper tea
100 = number oz of better tea
.05 * 100 = 5.00 = value of better tea
.03 = value of mixture
.03(x + 100) = value of mixture

.02x + 5.00 = .03(x + 100)
.02x + 5.00 = 3.00 + .03x
2.00 = .01x
x = 200

200 oz of .02 tea
math - helper, Wednesday, January 19, 2011 at 3:23pm
from above
.03 = value of mixture

this should be
x + 100 = mixture total number of oz

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