VERTEXTo determine the vertex (coordinate x) of parabola y = ax² + bx + c, use this following formula
x vertex =
![-\dfrac{b}{2a}](https://tex.z-dn.net/?f=%20-%5Cdfrac%7Bb%7D%7B2a%7D%20)
y = x² - 2x - 48
a = 1, b = -2, c = -48
plug in the numbers
x vertex =
![-\dfrac{b}{2a}](https://tex.z-dn.net/?f=%20-%5Cdfrac%7Bb%7D%7B2a%7D%20)
x vertex =
![-\dfrac{(-2)}{2(1)}](https://tex.z-dn.net/?f=%20-%5Cdfrac%7B%28-2%29%7D%7B2%281%29%7D%20)
x vertex =
![\dfrac{2}{2}](https://tex.z-dn.net/?f=%20%5Cdfrac%7B2%7D%7B2%7D%20)
x vertex = 1
To find y vertex, substitute the value of x vertex to the parabola equation
y = x² - 2x - 48
y = 1² - 2(1) - 48
y = 1 - 2 - 48
y = -49
The vertex is (1, -49)X-INTERCEPTx-intercept located in x axis, that means y = 0. Substitute y = 0 to the parabola equation
x² - 2x - 48 = y
x² - 2x - 48 = 0
(x - 8)(x + 6) = 0
x = 8 or x = -6
The x-intercepts are (8,0) and (-6,0)The answer is first option
Answer:
33-40-45
Step-by-step explanation:
9x + 21 is the same as 3(3x +7)
Answer:
$2266
Step-by-step explanation:
Ⓗⓘ ⓣⓗⓔⓡⓔ
Well, 3% of $2200 is $66
$2200+$66=$2266
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