To make purple paint you must mix 3 cups of blue paint with 2 cups of red paint. Sally plans to use 9 cups of blue paint in her batch of purple paint. Which proportion could be used to find out how much red paint Sally will need to make purple paint?

Which of the following vectors are orthogonal to (2,1)? check all that apply

Triangle xyz, with vertices x(-2, 0), y(-2, -1), and z(-5, -2), undergoes a transformation to form triangle x′y′z′, with vertices x′(4, -2), y′(4, -3), and z′(1, -4). the type of transformation that triangle xyz undergoes is a . triangle x′y′z′ then undergoes a transformation to form triangle x′y′z′, with vertices x″(4, 2), y″(4, 3), and z″(1, 4). the type of transformation that triangle x′y′z′ undergoes is a .

Me because i don't understand how to do it.: )