Marty spent 2 7/10 hours studying for a test. kim spent 3 1/4 hours studying for the same test. how much longer did kim study than marty?

Given f(x)=2x^2-8x+6 and g(x)=3x-1 find f(x) +g(x) a. 2x^2+5x+5 b.2x^2-11x+7 c. 2x^2-5x+5 d.2x^2-5x-5

Aclassmate thinks that solving a system by graphing gives an exact answer when the lines appear to cross at a grid point, but only an approximate answer when they don't. explain why this isn't true.

Prove that 16^4-2^13-4^5 is divisible by 11.