The Martin family is considering building a new house. On the blueprints, the dimensions of the outside of the house are 20 inches wide by 22 inches long. If the house is actually going to be 30 feet wide, what will be the perimeter of the house?

Is trapezoid abdc the result of a dilation of trapezoid mnpq by a scale factor of ? why or why not? yes, because ab and cd are each the lengths mn and qp. yes, because sides ab and cd are parallel to sides mn and qp. no, because ab is the length mn but cd is the length qp. no, because sides ab and cd have different slopes from sides mn and qp.

Simplify. −4x^2 (5x^4−3x^2+x−2) −20x^6−12x^4+8x^3−8x^2 −20x^6+12x^4−4x^3+8x^2 −20x^8+12x^4−4x^2+8x −20x^6+12x^4+4x^3−8x^2

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.