Answer:
x = 3
ST = 24
Step-by-step explanation:
if T is the midpoint then ST = TU
8x = 2x + 18 move like terms to the same side
8x - 2x = 18 subtract like terms
6x = 18 divide both sides by 6
x = 3 to find ST replace x with 3
Propably 4 and negative 2
For each of the ordered pairs, the x coordinate is squared to find y.
x = 1
1^2 = 1
x = 2
2^2 = 4
x = 3
3^2 = 9
x = 4
4^2 = 16