Answer:
68º
Step-by-step explanation:
This is a quadrilateral and all degrees in every quadrilateral have to add up to 360º.
81º + 135º + 76º = 292º
360º - 292º = 68º
Therefore, x = 68º
Answer:
11
Step-by-step explanation:
Plug in
0 for j to get 1
1 for j to get -2
2 for j to get 4
3 for j to get -8
4 for j to get 16
Then add 1 - 2 + 4 - 8 + 16 = 11
Answer:
7a true
7b false
7c true
7d false
Step-by-step explanation:
hope this helps........ can you give brainlyist
We have that
<span>the equation
y=-3x</span>²<span> + x -4
the </span><span>real number solutions are the points x intercept of the graph
are the points when y=0
using a graph tool
see the attached figure
</span><span>the graph has no point of intersection with the x axis
</span>therefore
the answer is
there are zero real numbers solutions
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.