exam
Maths Puzzle
Numerical Ability
Janet invested $27,000, part at 15% and part at 9%. If the total interest at the end of the year is $3,390, how much did she invest at 15%?
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exam Other Question
1 - 4/y^2 / 1-2/y-8/y
What is the domain of the function F given by F(x)=x+4/x ?
I think the answer is "all reall numbers except 0"
Given f(x)=4-x-x^2 find f(3)
I think th answer is f(3)=-8
thank you!