X = 8.5 because 8.5 x 2 = 17 and 17 + 1 = 18
Answer:
its 72
Step-by-step explanation:
hope this helps
Answer:
x = 2
Step-by-step explanation:
The axis of symmetry is a vertical line passing through the vertex, with equation
x = c ( c is the x- coordinate of the vertex ) , then
x = 2 ← equation of axis of symmetry