Simplify: a(3+5a)-4(a2+5)

1. what is the measure of ∠abc? what is the measure of ∠abd?

Which composition of similarity transformations maps polygon abcd to polygon a'b'c'd'? a dilation with a scale factor less than 1 and then a reflection a dilation with a scale factor less than 1 and then a translation a dilation with a scale factor greater than 1 and then a reflection a dilation with a scale factor greater than 1 and then a translation

Find the multiplicative inverse of 8-12i