anonymous
  • anonymous
Every evening Jenna empies her pockets and puts her change in a jar. At the end of the week she counts her money. One week she had 40 coins, all of them dimes and quarters. When she added them up, she had a total of $7.75. d= number of dimes q= number of quarters How many quarters did Jenna have?
Algebra
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
d+q=40 but I don't know what to do next
anonymous
  • anonymous
\[( d + q = 40, 10 d + 25 q = 775 )\]
anonymous
  • anonymous
The second equation concerns pennies. { d -> 15, q -> 25 }

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anonymous
  • anonymous
ok so then you can substitute the values and find the answer
anonymous
  • anonymous
so 15+25=40
anonymous
  • anonymous
I got 15 dimes and 25 quarters
anonymous
  • anonymous
Replace d below with 40-q 10 d + 25 q = 775 /. d -> 40 - q solve the following for q: 10 (40 - q) + 25 q = 775
anonymous
  • anonymous
15*10+25*25=775
anonymous
  • anonymous
thank u :D

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