anonymous
  • anonymous
A box contains a total of 14 quarters and dimes. the total value of the coins is $2.15. How many dimes and quarters are in the box?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
hey
anonymous
  • anonymous
try to convert the sentences into equations.
anonymous
  • anonymous
A box contains a total of 14 quarters and dimes -> q+d = 14

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anonymous
  • anonymous
ok
anonymous
  • anonymous
total value is $2.15 -> (.25)*q +(.10)*d=2.15
anonymous
  • anonymous
yep got that far
anonymous
  • anonymous
to solve a system of equations, you want to solve for one variable in terms of the other and then plug that into the equation you didn't use
anonymous
  • anonymous
Oh ok, but i cant figure out which one to use in this situation :(
anonymous
  • anonymous
??
anonymous
  • anonymous
well, you can do any number of things
anonymous
  • anonymous
you just want to get one variable by itself on one side of an equation and some stuff with the other variable on the other side
anonymous
  • anonymous
d = (something with q's)
anonymous
  • anonymous
but keep the value right?
anonymous
  • anonymous
you start with one of the equations
anonymous
  • anonymous
so...\[2.15=.10x+.25x\]? But where do i insert the 14?
anonymous
  • anonymous
no. you can't just change a q into a d
anonymous
  • anonymous
k.
anonymous
  • anonymous
do you know how to manipulate an equation without really changing the meaning?
anonymous
  • anonymous
Yeah
anonymous
  • anonymous
make it look different but still true?
anonymous
  • anonymous
you want to do that to one of them, but you want to get either d = or q = at the end
anonymous
  • anonymous
k, well its getting late here and I really appreciate your help but i think ima just wing it XD Parents say g2g to bed thanks alot though !
anonymous
  • anonymous
ok good luck

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