Answer:
x = 12
Step-by-step explanation:
9*x-4*(x-3)-(72)=0
Step by step solution :
Step 1 :
Equation at the end of step 1 :
(9x - 4 • (x - 3)) - 72 = 0
Step 2 :
Step 3 :
Pulling out like terms :
3.1 Pull out like factors :
5x - 60 = 5 • (x - 12)
Answer:
Mean: 78.8
M.A.D(Mean Absolute Deviation): 2.3
Step-by-step explanation:
Mean: 73, 75, 76, 78, 78, 79, 79, 80, 81, 81, 82, 84 = 946/12 = 78.8
Mean Absolute Deviation (M.A.D):
78.8 - 73 = 5.8
78.8 - 75 = 3.8
78.8 - 76 = 2.8
78.8 - 78 = 0.8
78.8 - 78 = 0.8
78.8 - 79 = 0.2
78.8 - 79 = 0.2
78.8 - 80 = 1.2
78.8 - 81 = 2.2
78.8 - 81 = 2.2
78.8 - 82 = 3.2
78.8 - 84 = 5.2
5.8 + 3.8 + 2.8 + 0.8 + 0.8 + 0.2 + 0.2 + 1.2 + 2.2 + 2.2 + 3.2 + 5.2 = 28.4/12 = 2.3
~hope this helps~
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Answer:
The equation of parabola is x² + 20 y + 60 = 0
Step-by-step explanation:
Given as :
The focus point of parabola = (0 , - 3)
The directrix is y = 2
The equation of parabola in vertex form is written as
(x - h)² = 4 p (y -k)
where (h , k) = (0, - 3)
And directrix y = k - p
So , 2 = k - p
Or p = k - 2
Or, p = - 3 - 2
∴ p = - 5
So, the equation of parabola is
(x - 0)² = 4 × ( - 5 ) (y + 3)
or, x² = - 20 ( y + 3)
or, x² = - 20 y - 60
Hence The equation of parabola is x² + 20 y + 60 = 0 Answer
Answer:
C
Step-by-step explanation:
