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 3 years ago
Stephanie has 23 coins in her piggy bank. She only puts dimes and pennies inside. If she has $1.58, how many dimes does she have?
 3 years ago
Stephanie has 23 coins in her piggy bank. She only puts dimes and pennies inside. If she has $1.58, how many dimes does she have?

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montypython
 3 years ago
Best ResponseYou've already chosen the best response.0Set this up as a system of equations where x = the number of dimes and y = the number of pennies If she has a total of 23 coins then one equation is \[x+y=23\] And if the total is $1.58 the other equation is \[10x + y = 158\] subtract the two equations and solve for x \[(10x  x) + (y  y) = (15823)\] \[9x = 135\] \[x = 15\] Thus, Stephanie has 15 dimes and 8 pennies.
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