Answer:
90/13, 45/13
Step-by-step explanation:
![- 2 = x \\ 7x + 9y = - 45 \\ \\ 7 \times ( - 2)y + 9y = - 45 \\ y = 9 \\ \\ 7x + 9 \times 9 = - 45 \\ x = - 18 \\ (x.y) = (- 18.9) \\ \\](https://tex.z-dn.net/?f=%20-%202%20%3D%20x%20%5C%5C%207x%20%2B%209y%20%3D%20%20-%2045%20%5C%5C%20%20%5C%5C%207%20%5Ctimes%20%28%20-%202%29y%20%2B%209y%20%3D%20%20-%2045%20%5C%5C%20y%20%3D%209%20%5C%5C%20%20%5C%5C%207x%20%2B%209%20%5Ctimes%209%20%3D%20%20-%2045%20%5C%5C%20x%20%3D%20%20-%2018%20%5C%5C%20%28x.y%29%20%3D%20%20%28-%2018.9%29%20%5C%5C%20%20%5C%5C%20)
Simplify:
![- 2 \times 9 = - 18 \\ 7 \times ( - 18) + 9 \times 9 = - 45 \\ - 18 = - 18 \\ - 45 = - 45](https://tex.z-dn.net/?f=%20-%202%20%5Ctimes%209%20%3D%20%20-%2018%20%5C%5C%20%207%20%5Ctimes%20%28%20-%2018%29%20%2B%209%20%20%5Ctimes%209%20%3D%20%20-%2045%20%5C%5C%20%20-%2018%20%3D%20%20-%2018%20%5C%5C%20%20-%2045%20%3D%20%20-%2045)
Answer:
An airline claims that the no-show rate for passengers is less than 5%. In a sample of 420 randomly selected reservations, 19 were no-shows. At α=0.01, test the airline's claim. State the sample percentage and round it to three decimal places.
State the hypotheses.
State the critical value(s).
State the test statistics.
State the decision
State the conclusion.
Answer:
Therefore x =5
Step-by-step explanation:
marke me as branalist answer
Answer:
B. false
Step-by-step explanation:
Answer as a compound inequality: ![-4 \le y < 2](https://tex.z-dn.net/?f=-4%20%5Cle%20y%20%3C%202)
Answer in interval notation: [-4, 2)
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Explanation:
The range is the set of all possible y outputs of a function. When dealing with a graph like this, we just look at the highest and lowest points to determine which y values are possible.
The lowest point occurs when y = -4. We include this value. So far we have
which is the same as ![-4 \le y](https://tex.z-dn.net/?f=-4%20%5Cle%20y)
The upper ceiling for the y value is y = 2. We can't actually reach this value because of the open hole at (-3,2). So we say that ![y < 2](https://tex.z-dn.net/?f=y%20%3C%202)
Combine
and
to get the compound inequality ![-4 \le y < 2](https://tex.z-dn.net/?f=-4%20%5Cle%20y%20%3C%202)
This says y is between -4 and 2, including -4 but excluding 2.
To convert this to interval notation, we write [-4, 2) where the square bracket says to include the endpoint and the curved parenthesis says to exclude the endpoint.