Question
3 apples plus 2 pears cost .78 but 2 apples and 3 pears cost .82. What is the cost of 1 apple and 1 pear?
Answers
Reiny
3a+2p=.78
2a+3p=.82
#1 x 3 : 9a+6p=2.34
#2 x 2 : 4a+6p=1.64
subtract them ...
5a = .70
a=.14
in #1
3(.14) + 2p = .78
p = .18
so 1 apple and 1 pear = .....
2a+3p=.82
#1 x 3 : 9a+6p=2.34
#2 x 2 : 4a+6p=1.64
subtract them ...
5a = .70
a=.14
in #1
3(.14) + 2p = .78
p = .18
so 1 apple and 1 pear = .....
Anonymous
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A box full of exercise books weigh 12kg.if one exercise book weigh 10.2g.find the approximate number of exercise books in the box
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Tobeybear
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