exam Maths Puzzle Numerical Ability

Roberto invested some money at 7%, and then invested $2000 more than twice this amount at 10%. His total annual income from the two investments was $3980. How much was invested at 10%?

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exam Other Question

The length of a rectangle measures 2x-3 and the width measures x+8. Express the perimeter of the rectangle as a binominal in terms of x If f(x)=x+5 and g(x)=px^2+q, find the following composite function.

a.) Find p and q if g^o f(x)=x^2+10x
b.) Find f^o g(x)

Hence, evaluate f^o g(0), f^o g(2)f^o g(0)and g^o