Answer:
C
Step-by-step explanation:
A function is when the x value has ITS OWN Y VALUE, so the x value can't have more than one y value.
Can't be A, because 6 and 13 both have 10
Can't be B, because there are two x - values (6 and 6)
It can only be C, because each x-value has a different y-value
Answer: 50
Step-by-step explanation: 42x12=504. 504-4=500. 500/10=50.
Answer: d. s ≥ 23
Step-by-step explanation:
Let s be the side of the square.
We know that the perimeter of a square =4s
Let f(s)=4s
If the cardboard should have a perimeter equal to at least 92 inches, the inequality would look like

Divide both sides by 4, we get

Thus, d. is the right answer. The reasonable domain of f(s) is 
Answer:
18
Step-by-step explanation:
3 times 3 equals 9
9 times 2 equals 18
The formula of a trapezoid is the sum of the both bases multiplied by the height then divided by 2.