exam
Maths Puzzle
Numerical Ability
A total of $8000 is invested, part at 6% and the remainder at 9%. How much is invested at each rate if the annual interest is $540?
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exam Other Question
(x^2-2/x)^2-7(x^2-2/x)-18=0
TRANSLATION: open parenthesis: x squared minus two divided by x closed parenthesis minus 7 open x squared minus two divided by x minus 18=0
Solve each system by the addition method.
(1/8)x+(1/4)y+5
(1/6)x+(1/2)y=7
and
1.5x-2y=-0.25
3x+1.5y=6.375