Hello!
You can multiply (x-12) and (x+4)
x * x = x^2
x * 4 = 4x
-12 * x = -12x
-12 * 4 = -48
Now we have
x^2 - 8x - 48 = 9
Subtract 9 from both sides
x^2 - 8x -57 = 0
Use the quadratic formula
This give use the answer of
x = 4 +
Hope this helps!
Answer:
The expected amount for a duration of 20 weeks is $9.4
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Step-by-step explanation:
Read attachment to understand the complete question
From the question, we have the following given parameters:
x = Amount paid for a second movie
--- Expected value of x
--- Standard deviation of x
Required
Determine the total amount paid for a second movie for 20 weeks
The required implies that we calculate the expected value for a duration of 20 weeks.
i.e.
If
Then:
Substitute 20 for n
Substitute 0.47 for E(x)
<em>Hence, the expected amount for a duration of 20 weeks is $9.4</em>
Answer X = 2
Step-by-step explanation:
-30 + -18 - X + - 24,
+ 30 +30
0 6
-18 -x = -6
DIVIDE
3 -x = -1
BRING THE 3 OVER TO THE NEGATIVE ONE
YOU GET
X = 2
Answer:
A. 3:7
Step-by-step explanation:
The volume of the smaller cube is 216 m³.
The volume of the larger cube is 2744 m³
Let the similarity ratio be 
The volume of these two cubes are in the ratio:
This implies that:
We take the cube root of both sides to obtain:
![\frac{l}{L} =\sqrt[3]{\frac{216}{2744}}](https://tex.z-dn.net/?f=%5Cfrac%7Bl%7D%7BL%7D%20%3D%5Csqrt%5B3%5D%7B%5Cfrac%7B216%7D%7B2744%7D%7D)
This simplifies to:
Therefore the ratio is 3:7
