Probability is calculated by comparing the odds to a certain event occurring to the number of possible events.
P=

For example, take a six-sided dice number 1-6 on each side. The probability of rolling a 4 would be1 in 6 or 1/6. This is because of the six possible outcomes, rolling a 4 is only one of them.
P(4)=1/6
Now take the same dice. The probability of rolling an even number is 3/6. To see why, lets look at the total possible outcomes:
1
23
45
6
Of the 6 possibilities, 3 are even numbers.
P(even)=3/6 or 1/2
When you solve proportions, you have to cross multiply.
9 x
--- = --- Multiply each numerator by the opposite denominator.
11 22
(9)(22) = 11x Then, multiply.
198 = 11x Then, divide.
18 = x
Yes, it is. You can't change how old someone is.
Answer:
44
Step-by-step explanation:
All interior angles of any triangle add up to 180

Step-by-step explanation:
x^2+3x-108
= x^2+ ( 12-15)x -108
= x^2+ 12x - 15x - 108
= x(x+12) - 15 (x+12)
= (x-15) (x+12)