anonymous
  • anonymous
I NEED HELP ASAP! Medal would be given! C:
Physics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
@abb0t @timo86m @AgentZero help guys!
anonymous
  • anonymous
i have this so far: N=d +5 as an equation but idk what to do or if im right :C
anonymous
  • anonymous
I know its 7 dimes and 12 nickels but idk how though?

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anonymous
  • anonymous
7x(.10) + 12x(.05) = $1.30 i know this is what im suppose to do but where did the 7 and 12 come from?
anonymous
  • anonymous
let me dbl check mines :D
anonymous
  • anonymous
did you delete one of your posts?
anonymous
  • anonymous
Naw why? 0_o & i get that but how do you ended up with 7 & 12 like how though i know all the plug in stuff and eqution i just dont get why its 7 & 12 besides thats it shows it has 5 more nickels
anonymous
  • anonymous
5 more nickels than dimes n=.05 d=.1 the 2 above by definition x =5+ y ^ 5 more and we assume y is number of nickels xn+yd=1.3
anonymous
  • anonymous
I got it now :D
anonymous
  • anonymous
First step is to clean it up n=.05 eq1 d=.1 eq 2 x =5+ y eq 3 xn+yd=1.3 eq 4 --------------- we plug in n and d to the 4th equation x*.05+y*.1=1.3 eq 5 then we plug in eq 3 into eq 5 (5+y)*.05+y*.1=1.3 .25+.05y + .1y =1.3 distributed the .05 then rearange y*.1 to .1y .25+.15y=1.3 add like terms the ys in this case .15y=1.05 subtract .25 from both sides y= 7 divide both sides by .15 now you have y=7 one of the answers use eq 3 x =5+ y x=5+7 and x = 12

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