Question

Given the quadratic equation y=5x2+8x+9
𝑦
=
5
𝑥
2
+
8
𝑥
+
9
, solve for the y-coordinate of the parabola when x=−3
𝑥
=
−
3
.(1 point)

Answer 1

Plug x = −3 into y = 5x^2 + 8x + 9:
y = 5(−3)^2 + 8(−3) + 9 = 5·9 − 24 + 9 = 45 − 24 + 9 = 30.
So y = 30.