Prove the reciprocal of a+bi is equal with a/(a^2+b^2)-bi(a^2+b^2).

Can someone me do math because i am having a breakdown rn because i don’t get it

Given ab and cb are tangents of p, and m =10°. what is the measure of abp?

Ms.ortiz sells tomatoes wholesale. the function p(x)=-80x^2+320x-10, graphed below, indicates how much profit she makes on a load of tomatoes if she makes on a load of tomatoes if she sells them for 4-x dollars per kilogram. what should ms.ortiz charge per kilogram of tomatoes to make on a load of tomatoes?