Answer:
C
Step-by-step explanation:
80 is less than 81, but more than 68.
Answer:
34 pounds
Step-by-step explanation:
3x9=27
27+7=34
Answer: 160 yd^2
Step-by-step explanation: (120 yards)*(16 inches)*(1 yard/12 inches) = 160 yd^2
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 )
