Posted by Ginny on Sunday, April 10, 2011 at 1:21pm.
Staples recently charged $17.99 per box of Pilot Precise rollerball pens and $7.49 per box for Bic Matic Grip mechanical pencils. If Kelling Community College purchased 120 such boxes for a total of $1234.80, how many boxes of each type did they purchase?

College Algebra  PsyDAG, Monday, April 11, 2011 at 2:38pm
Let x = boxes of Pilot and y = boxes of Bic
x + y =120 therefore
x = 120  y
17.99x + 7.49y = 1234.8
Substitute 120y for x in second equation and solve for y. Insert that value into the first equation and solve for x. Check by inserting both values into the second equation.

College Algebra  erianne, Wednesday, April 20, 2011 at 12:16am
32 boxes of pilot and 88 boxes of Bic
32x17.99 = 575.68
88x 7.49 = 659.12
total = 1234.80

College Algebra  kim, Sunday, April 24, 2011 at 9:07am
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