Which of the following is a function? A. (1,1),(-1, 1), (2,3).(-2,1))
B. {(1,1),(-1,-1),(-1,3), (2, 2)}
C. (0-1),(0,1),(1,0),(-1,2)
D.{(0,0), (1, 1), (0, -1), (1,-1)

5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116

on the middle line

step-by-step explanation:

1/5=50