Seudónimo
Seudónimo
03-05-2017
Mathematics
contestada
How many coins are dimes?
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NJhnsn
NJhnsn
03-05-2017
The correct answer is D or 26 cents
Having 3 less dimes than pennies denotes having 6 pennies or 6 cents, then 3 dimes is equal to having 15 cents. 6+16=26
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irspow
irspow
03-05-2017
p+d=9
p=9-d we are also told that:
d=p-3
p=d+3....since p=p we can say
d+3=9-d add d to both sides
2d+3=9 subtract 3 from both sides
2d=6 divide both sides by 2
d=3, and since p+d=9, p=9-d so
p=6
So Jack has 3 dimes and 6 pennies which is:
3(0.10)+6(0.01)
0.30+0.06
$0.36
So he has 36 cents.
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