Answer:
no
Step-by-step explanation:
First, distribute the -3(-2x + 1).
-3 x -2x = 6x -3 x 1 = -3 -3(-2x + 1) = 6x - 3
Now we have:
9 - 5 1/2x + 6x - 3
Combine like terms.
-5 1/2x + 6x = 1/2x 9 - 3 = 6
The two terms we are left with are 1/2x and 6.
The simplified version of this expression is 1/2x + 6.
Hope this helps!
Answer:
So, the expected value of the time it takes to commute is 16 minutes.
Step-by-step explanation:
Let X is time it takes you to commute. We calculate E(X)?
We know that the probability that you will have to wait for a train is 1/5, or .20. If you don’t have to wait, the com mute takes 15 minutes, but if you have to wait, it takes 20 minutes.
The probability that you will have to wait for a train is
:
The probability of not waiting for a train is:
So we get the following probability distribution:
We calculate E(X):
So, the expected value of the time it takes to commute is 16 minutes.
Expected value is not always the actual travel time, because it can sometimes take anywhere from 15 to 20 minutes.
Answer:
r= -15
Step-by-step explanation:
when a negative subtracts a negative you just add more negatives
2r
r= -15
2x-15= -30, -30- -6= -36
Answer:
Step-by-step explanation:
The lengths of line segments and because of the two segments and two angles marked as equal in the diagram. Because of this, the arcs and are equal.
Since there are 360 degrees in a circle, we can now set up the following equation: