Domain and range of the function

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

Which expression can be used to determine the slope of the line that passes through the points -6, three and one, -9

Plz determine whether the polynomial is a difference of squares and if it is, factor it. y2 – 196 is a difference of squares: (y + 14)2 is a difference of squares: (y – 14)2 is a difference of squares: (y + 14)(y – 14) is not a difference of squares