Give an algebraic proof that 2n choose 2 = 2 (n choose 2) +n^2

Match each equation with the operation you can use to solve for the variable. 1 subtract 10 2 divide by 10 3add 18 4add 10 5 subtact 18 6multiply by 5. 7multiply by 10. a 5 = 10p b p + 10 = 18 c p + 18 = 5 d 5p = 10

How is the number of vertices for a prism related to the name of the prism

Lines a and b are parallel. what is the value of x? -5 -10 -35 -55