Answer:
(x, y) = (7, - 1)
Step-by-step explanation:
given the 2 equations
x + 7y = 0 → (1)
2x - 8y = 22 → (2)
Rearrange (1) expressing x in terms of y by subtracting 7y from both sides
x = - 7y → (3)
Substitute x = - 7y in (2)
2(- 7y) - 8y = 22
- 14y - 8y = 22
- 22y = 22 ( divide both sides by - 22 )
y = - 1
Substitute y = - 1 into (3) for corresponding value of x
x = - 7 × - 1 = 7
Solution is (7, - 1 )
The probability that at most 8 of them take the bus to school is 0.925, written in percentage form this is 92.5%
<h3>
How to find the probability?</h3>
We know that roughly 75% of the students take the bus, then, if we select a student at random.
- There is a probability of 0.75 that the student takes the bus.
- There is a probability of 0.25 that the student does not take the bus.
The probability that at most 8 out of 9 students take the bus, is equal to one minus the probability of the 9 taking the bus, which is:
p = (0.75)^9 = 0.075
Then we have:
P = 1 - 0.075 = 0.925
The probability that at most 8 of them take the bus to school is 0.925, written in percentage form this is 92.5%
If you want to learn more about probability, you can read:
brainly.com/question/251701
Answer:
Its correct
Step-by-step explanation:
Its correct since its correct