ANSWER
The vertex is (1,-3)
EXPLANATION
The given parabola has equation:

We group the variables to obtain:

We complete the square to get,



The vertex is of the parabola is (1,-3)
Thx so much 8th grade math is so hard and I’m stuck on like ever question I get
X=lenght of the shortest side
15 in / 8 in=9 in / x
15 in * x=9 in * 8 in
x=(9 in * 8 in) / 15 in=72 in² / 15 in=4.8 in
Answer: C) 4.8 inches.