Answer:
y = 3x² + 54x + 240
Step-by-step explanation:
The equation of a parabola in vertex form is
y = a(x - h)² + k
where (h, k) are the coordinates of the vertex and a is a multiplier
here (h, k) = (- 9, - 3), thus
y = a(x + 9)² - 3
To find a substitute either of the roots into the equation
Using (- 8, 0), then
0 = a(- 8 + 9)² - 3
0 = a - 3 ( add 3 to both sides )
a = 3
y = 3(x + 9)² - 3 ← in vertex form
Expand factor and simplify
y = 3(x² + 18x + 81) - 3
= 3x² + 54x + 243 - 3
= 3x² + 54x + 240 ← in standard form
Answer:
slope-2/3
Step-by-step explanation:
slope formula (y2-y1)/(x2-x1)
plug in the coordinates
(11-5)/(6--3)
two negatives equal a positive
(11-5)/(6+3)
add or subtract the numbers
6/9
simplify
2/3
I’m pretty sure the answer is D.
Answer:
No, because 3 + 5 > 4, 5 + 4 > 3, and 4 + 3 > 5
