I believe the answer is 4 if you need an explanation then reply to me!
Answer:
108
Step-by-step explanation:
3 ft. squared is 9 ft.
9x12=108
Just the first one, r is 4x+2, and h is 5x+4, plug them into the formula pls
40 because 3+6+12 = 21 and 8+11+21 =40
Answer:
y = (x - 4)² - 25
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
To obtain this form use the method of completing the square.
Given
y = (x + 1)(x - 9) ← expand factors using FOIL, thus
y = x² - 8x - 9
To complete the square
add/subtract ( half the coefficient of the x- term )² to x² - 8x
y = x² + 2(- 4)x + 16 - 16 - 9
= (x - 4)² - 25 ← in vertex form