Graph y-3>-12 on a number line please

15 points !

An equation of the line tangent to y=x^3+3x^2+2 at its point of inflection is

If f(x)=2x-6 and g(x)=3x+9, find (f-g)(x)

Ateacher brought a pack of 17 batteries . each calculator uses 3 batteries . how many calculator can the teacher fill with batteries