Which expression is equivalent to 4.4.4.4.4.4.4.4?

Find parametric equations for the line tangent to the curve of intersection of the surfaces at the given point. surfaces: xsquared2plus+2yplus+2zequals=1212 yequals=33 point: left parenthesis 1 comma 3 comma five halves right parenthesis

What is the ratio of the change in y-values to the change in x-values for this function? a) 1: 13 b) 2: 5 c) 5: 2 d) 13: 1

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)