Answer:
vertex = (- 10, - 10 )
Step-by-step explanation:
The equation of a quadratic in vertex form is
y = a(x - h)² + k
where (h, k ) are the coordinates of the vertex and a is a multiplier
To obtain this form use the method of completing the square.
Given
h(x) = x² + 20x + 90
add/subtract ( half the coefficient of the x- term )²
h(x) = x² + 2(10)x + 100 - 100 + 90
= (x + 10)² - 10 ← in vertex form
with (h, k ) = (- 10, - 10 )
Answer:
15
Step-by-step explanation:
She is currently 15. 45 years from now she will be 60. 60 is 4 times her current age. So right now, she is 15
Answer:
here with me
Step-by-step explanation:
5/9 is already in it's simplest form
4/6 can be reduced to 2/3