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)

Simonne used the following steps to simplify the given expression. 12 - 3(-2x + 4) step 1: 12 + (–3)·(–2x) + (–3)·(4) step 2: 12 + 6x + (–12) step 3: 12 + (–12) + 6x step 4: 0 + 6x step 5: 6x what property of real numbers was used to transition from step 3 to step 4? a. identity property of addition b. inverse property of addition c. associative property of addition d. commutative property of addition

Point r divides in the ratio 1 : 5. if the coordinates of e and f are (4, 8) and (11, 4), respectively, what are the coordinates of r to two decimal places?

The longer leg of a 30-60-90 trangle is 18