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$1.00 2 algebra questions

  • From Mathematics: Algebra
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  • Due on Dec. 03, 2011
  • Asked on Oct. 31, 2011 at 12:49:12AM
Asked by :
ironworks
ironworks Not confirmed
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Q:

1. A sum of money amounting to $4.50 consists of dimes and quarters. If there are 21 coins in all, how many are quarters?

A) 21       B) 5         C) 7         D) 16

2. a college student earned $5400 during summer vacation working as a waiter in  a popular restaurant. The student invested part of the money at 8% and the rest at 6%. If the student received a total of $370 in interest at the end of the year, how much was invested at 8%?

A) $900    B) $3100       C) $2700      D)$2300

 

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  • This tutorial was purchased 2 times and rated A+ by students like you.
  • Posted on Oct. 31, 2011 at 12:54:06AM
Posted by :
littleFermat
littleFermat
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A:
Preview: ... ...   ...
The full tutorial is about 3 words long .
 
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  • This tutorial was purchased 1 time and rated No Rating by students like you.
  • Posted on Oct. 31, 2011 at 12:57:01AM
Posted by :
Sarah_Ann
Sarah_Ann
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A:
Preview: ... d+.25q=4.50 solve for d in the first equation: d+q=21 d=21-q now substitute this in to the second equation and solve for q .10d+.25q=4.5 .10(21-q)+.25q=4.5 2.1-.10q+.25q=4.5 2.1+.15q= ...
The full tutorial is about 119 words long .