What does this mean and how do u solve it?

After applying the composition r0.90 ry to rs what are the coordinates of r' and s'? a.r'(–3, 1),  s'(–3, 5)b.r'(–1, 3),  s'(–5, 3)c.r'(1, 3),  s'(5, 3)d.r'(5, 3),  s'(1, 3)

Which of the binomials below is a factor of this trinominal? x^2-13+30

Evaluate the expression for the given value of the variable. 5×(h+3) for h=7