Answer:
B
Step-by-step explanation:
Given
4x² - 72x = 0 ← factor out 4 from each term
4(x² - 18x) = 0
To complete the square
add/subtract (half the coefficient of the x- term)² to x² - 18x
4(x² + 2(- 9)x + 81 - 81) = 0
4(x - 9)² - 4(81) = 0
4(x - 9)² - 324 = 0 ( add 324 to both sides )
4(x - 9)² = 324 ( divide both sides by 4 )
(x - 9)² = 81 ( take the square root of both sides )
x - 9 = ± 
= ± 9 ( add 9 to both sides )
x = 9 ± 9
Then
x = 9 - 9 = 0
x = 9 + 9 = 18
Answer:
A. 2^20/3^8
Step-by-step explanation:
Hope this helped, have a good day <3
Answer:
h = 22 for Rachel
Step-by-step explanation:
20 + h = 42
h = 42 - 20
h = 22
Answer:
3/2 or 1.5
Step-by-step explanation:
Convert (-3 1/3) to -10/3
Now its -5/(-10/3)
The 3 is multiplied by the -5
(-5)(3)/(-10)
=(-15)/(-10)
The negatives cancel and it reduces to 3/2
Answer:
The slope of the line is -3.
Step-by-step explanation:
The slope equation is:
m= y2-y1/x2-x1
In this case:
m= -3-6/2+1 (remember that a negative minus a negative gives you a positive)
Which equals:
m=-9/3
Divide and you get -3.
