anonymous
  • anonymous
Martha went shopping & bought each of her five nephews a gift, either a video costing $14.95 or a CD costing $16.88 She spent $76.88 on their gifts. How many videos & How many CD's did she buy?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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Mertsj
  • Mertsj
v+c=5 14.95v+16.88c=76.88 Multiply the second equation to get rid of the decimals Replace v in the second equation with 5-c from the first equation and solve. I believe it was 10 nephews last night.
anonymous
  • anonymous
It wasn't me. This is my 1st day on this group. Please, go check original poster from last night!
anonymous
  • anonymous
I still don't get it.

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More answers

Mertsj
  • Mertsj
Did you multiply the second equation by 100 to get rid of the decimals?
anonymous
  • anonymous
(100)14.95v + (100)16.88c = (100)76.88 1495v + 1688c = 7688 Is that right?
Mertsj
  • Mertsj
Yes.
Mertsj
  • Mertsj
Now from the first equation, v=5-c replace v with 5-c and solve
anonymous
  • anonymous
1495v + 1688c = 7688 1495(5-c) + 1688c =7688 7475-1495c+1688c=7688 7475-193c=7688 -7475 -7475 -193c=213 Is that right?
Mertsj
  • Mertsj
7475-193c=7688 Should be 7475+193c
anonymous
  • anonymous
I got the 7475+193c=7688 I messed up my signs 7475+193c=7688 -7475 -7475 193c=213 c=1.10
Mertsj
  • Mertsj
Are you sure you copied the problem right? It should come out to be a whole number of videos and cd's. Someone posted this same problem last night and I thought it was 10 nephews. Please check the problem.
anonymous
  • anonymous
let me check
anonymous
  • anonymous
Her total is $76.68 not 76.88 as I posted,
Mertsj
  • Mertsj
That works
anonymous
  • anonymous
1495v + 1688c = 7668 1495(5-c) + 1688c =7668 7475-1495c+1688c=7668 7475+193c=7668 -7475 -7475 193c=193 So she bought 1 CD
Mertsj
  • Mertsj
Yes and 4 videos
anonymous
  • anonymous
Thank u
Mertsj
  • Mertsj
yw
anonymous
  • anonymous
It makes sense. I have trouble setting up application problems.
Mertsj
  • Mertsj
Everyone does in the beginning. The key is to keep practicing.
anonymous
  • anonymous
How do we give medals? I am new. I would like to give u a medal

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