Question

The Everton College store paid $1805 for an order of 47 calculators . The store paid $11 for each scientific calculator. The others, all graphing calculators, cost the store $57 each.
How man scientific calculators were ordered?
How many graphing calculators were ordered?

Answer 1

let the no of scientifice calc = x
then no of graph calc = 47 - x

cost of x scient calc = 11x
cost of 47- x graph calc = 57(47 - x) = 2679 - 57x

total cost is 1805
=> 11x + 2679 - 57x = 1805
=> -46x = 1805-2679
=> x = -874/-46
=> x = 19

so no of scient calc = x = 19
no. of graph calc = 47 - x = 47 - 19 = 28

Answer 2

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Answer 3

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Answer 4

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Answer 5

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Answer 6

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Answer 7

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Answer 8

I did.

Answer 9

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