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April 18, 2014

April 18, 2014

Posted by **spirit73** on Tuesday, September 29, 2009 at 8:51am.

the everton college store paid $1553

for an order of 42 calculators. the

store paid $9 for each scientific calculator. the others, all graphing calculators, cost the store $56 each. how many of each trupe of calculator was ordered?

the store ordered:

how many scientfic calculators?

graphing calculators?

- algebra 1 -
**Reiny**, Tuesday, September 29, 2009 at 9:08amhow about...

let the number of scientific calculators be x

then the number of graphing calc's is 42-x

then 9x + 56(42-x) = 1553

9x + 2352 - 56x = 1553

-47x = -799

x = 17

42-x = 25

So they bought 17 scientific and 25 graphing types.

check : 17(9) + 25(56) = 1553

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