exam Maths Puzzle Numerical Ability

Janet invested $31,000, part at 10% and part at 1%. If the total interest at the end of the year is $1,390, how much did she invest at 10%?

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exam Other Question

For the function defined by f(x)=5x-4, fin dthe formula for f-1(x).

For the function defined by f(x)=2-x^2, 0<x, use a sketch to help find a formula for f-1(x).

Solve the equ
twice a number is 12 less than 6 times the opposite of the number