What are some numbers that equal pie
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So,
P = A1 / (A1 + A2)
The formula for the area of regular octagon is
A = (1/2) (a) (8) (2a tan 180/8)
A = 8 a² tan 180/8
Where a is the apothem. Substituting, the answer would be
C.
0.27
Answer:
C.
.27
Step-by-step explanation:
e2020
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Volume of a rectangular prism
Volume = Area of Base × Height of prism
= Length × Width × Height of prism
Substitute!
168 = L × 7 × 3
168 = L × 21
Divide 21 on either sides to isolate L
21 and 21 cancels out
8 = L
L = 8 yd
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16. yes because it was not much but she beat the times by a few seconds.
17. true
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1. We assume, that the number 312 is 100% - because it's the output value of the task.
2. We assume, that x is the value we are looking for.
3. If 100% equals 312, so we can write it down as 100%=312.
4. We know, that x% equals 78 of the output value, so we can write it down as x%=78.
5. Now we have two simple equations:
1) 100%=312
2) x%=78
where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:
100%/x%=312/78
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.
7. Solution for 78 is what percent of 312
100%/x%=312/78
(100/x)*x=(312/78)*x - we multiply both sides of the equation by x
100=4*x - we divide both sides of the equation by (4) to get x
100/4=x
25=x
x=25
now we have:
78 is 25% of 312
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A. 3(2x + 7)(x - 3)
B. (3x + 9)(2x - 7)
C. (6x + 21)(x - 3)
D. 3(2x²+ x - 21)
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First, factor out a 3, since all of the coefficients are divisible by it.
You want to split the middle into two numbers that multiply to equal the product of the value of x² and the constant and add to equal the value of x.
Now, look at the coefficients here. We're looking for two numbers that mutliply to get -42 (2 times -21) and add to make 1.
Think of factors of 42. 7 times 6 is 42. 7 minus 6 is 1...your numbers are 7 and -6. Now all we have to do is split the middle and factor.
3*2x=6x
3*7=21 leaves you with (6x+21)(x-3)
follow FOIL: first outer inner last
F:6x*x=6x²
O:6x*-3=-18x
I:21*x=21x
L:21*-3=-63
6x² -18x+21x=3x -63
you would get 6x²+3x-63 so A is the answer