X2=-4 please help me find out

To describe a sequence of transformations that maps triangle abc onto triangle a"b"c", a student starts with a reflection over the x-axis.how should the student complete the sequence of transformations to map triangle abc onto triangle a"b"c"? plz

Plz hurry evaluate the expression a+b where a=8 and b=19

Solve the formula ax+ by = c for x.