If f(x) = x2 + 4x + 7 and g(x)=5(x + 4)2, which is an equivalent form of f(x) + g(x)?

Which expressions equal 9 when x=4 and y=1/3 a. x2+6y b. 2x + 3y c. y2-21x d. 5 (x/2) -3y e. 3x-9y

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.

What is y-5=3(x+1) in slope intercept form