Darla wants to get her family tree drawing framed. the perimeter of a rectangle is two times the length plus two times the width. write an algebraic expression to represent the perimeter of a rectangle.

This is my question~~ ( r ^ 4 - 2r ^ 3 - 23 r ^ 2 - 4r - 32)÷(r+4) ~~ i must use long division to solve it : / i was wondering if anyone world like to solve it. and if so, share step-by-step explanations! you! ❤

Plz ( true - false) all triangles have interior angles whose measure sum to 90.

The measurement of one angle of a right triangle is 42° what is the measurement of the third angle? (there is no picture)