Homework Help: please help

Posted by Shelly on Tuesday, July 26, 2011 at 12:53pm.

The Everton college store paid $1859 for an order of 49 calculators. The store paid $11 each for scietific calculators. The others, all graphing calculators, cost the store $55 eaach. How many of each type of calculator ws ordered? Please answer in detail so that I can see what is wrong and where. thank you.

please help - Anonymous, Tuesday, July 26, 2011 at 1:13pm
Let we have S scientific and G graphing
calculators. Then
S+G=49
11S+55G=1859

S=49-G
11(49-G)+55G=1859

S=49-G
44G=1859-539

G=30
S=19

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