SOLUTION: A college student earned $7,800 during summer vacation working as a waiter in a popular restaurant. The student invested part of the money at 9% and the rest at 8%. If the student
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Question 1134271: A college student earned $7,800 during summer vacation working as a waiter in a popular restaurant. The student invested part of the money at 9% and the rest at 8%. If the student received a total of $654 in interest at the end of the year, how much was invested at 9% question mark Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! x at 9% earned 0.09x
7800-x at 8% earned 624-.08x
those add to 654
so 0.01x+624=654
0.01x=30
X=$3000 @9% or $270
7800-x=$4600 @8% or $384
add to $654
