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iragen [17]
2 years ago
15

Pls help on this too

Mathematics
1 answer:
Nata [24]2 years ago
5 0
Is there more of the picture you can show us?
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A commercial aircraft gets the best fuel efficiency if it operates at a minimum altitude of 29,000 feet and a maximum altitude o
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Answer:

A

Step-by-step explanation:

A is correct because if the minimum is 29,000 feet, x (the airplane altitutude) must be greater than or equal to 29,000 ft. Since the maximum is 41,000 feet, x must be less than or equal to that number.

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Which of these are expressions?
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3 years ago
A student answers
Marina CMI [18]
So, we have the percentage she gets which is, 90% and the number of questions she answers correctly, which is 27

To find the number of questions in the exam, make an equation
(90% = \frac{90}{100} = 0.9)
\frac{90}{100} = \frac{27}{x}
cross multiply and equate them
90x = 27 x 100
90x = 2700
divide by 90 on either sides to isolate x in order to find the answer
\frac{90x}{90} =  \frac{2700}{90}
90 and 90 cancels out
x = 30
So your final answer will be, there were 30 questions in the exam paper.
3 0
2 years ago
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