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May 29, 2015

Homework Help: math

Posted by Angie on Friday, April 10, 2009 at 5:16pm.

Suppose you need $2.40 in postage to mail a package to a friend. You have 9 stamps, some $0.20 and some $0.34. How many of each do you need to mail the package?

So to solve this problem, I came up with two inequalities:

1. a + b is less than or equal to 9
2. 20a + 34b is greater than or equal to 240

Now I'm supposed to graph both inequalities, but how? I don't know how to find the intercepts for the inequalities or even which interecepts I'm supposed to find..

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