R is the midpoint of DA⎯⎯⎯⎯⎯. D has coordinates (5,−6), and R has coordinates (9,−2). Identify the coordinates of A.

Step-by-step explanation:

A(x₁ ,y₁)   & D(5 , -6)

Midpoint =

Compare x and y coordinates of both sides

           ;

x₁ + 5 = 18            ; y₁ - 6 = -4

      x₁ = 18 - 5     ; y₁       = -4 + 6

      x₁ = 13                 y₁ = 2

A(13 , 2)

step-by-step explanation:

which of the following statements correctly describes the expression below based on its degree and number of terms?

314 - 7x2 + 11