exam Maths Puzzle Numerical Ability

I need help to in solving these equation. I do not know which formula to use. I tried using the FOIL and the distribute methods but I am still confused.

12xsquared)+75

3x(sq

Read Solution (Total 0)

exam Other Question
It says to simplify
x^-2 y^3
I got x^2y^3=x.x.y.y.y
Please help me Thank You=) if someone wanted an average grade of 90 and they base the grade on 4 tests and the first 3 scores were 84 93 and 88 what would the last test score grade have to be to get a total average of 90?
85
88
92
or
95