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adoni [48]
3 years ago
6

On a certain multiple-choice test, 9 points are awarded for each correct answer, and 7 points are deducted for each incorrect or

unanswered question. Sally received a total score of 0 points on the test. If the test has fewer than 30 questions, how many questions are on the test?
Mathematics
1 answer:
PolarNik [594]3 years ago
3 0

Answer:

21

Step-by-step explanation:

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Exponetial funtion is
r-ruslan [8.4K]

An exponential function in mathematics is an exponential function is a function of the form where b is a positive real number, and in which the argument x occurs as an exponent. So its a function whose value is a constant raised to the power of the argument, especially the function where the constant is e.

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3 years ago
An air traffic controller is tracking two planes. To start, Plane A is at an altitude of 4385 feet and Plane B is at an altitude
Fantom [35]

Answer:

60 seconds, 7715 feet

Step-by-step explanation:

Plane A and B start out 615 feet apart, and we find this by subtracting the height of plane A from plane B, getting 5000-4385=615. Now we have to find how many more feet of altitude plane A is gaining per second over plane B.

To find this we subtract 45.25 from 55.5 and get 10.25 feet per second. Now to find out how many seconds until they'll be at the same altitude we simply divide 615 by 10.25, getting 60 seconds.

For the second part, to find the altitude at this point, we simply multiply the altitude gain of one of the planes per second by the time of 60 seconds to get how much altitude they gained over that time, and add it to the starting altitude. Doing this with plane B we get 45.25*60=2715, and we add that to 5000 to get the final answer of 7715.

4 0
3 years ago
Write an equation of the line that passes through the origin and
Vanyuwa [196]

Answer:

y = 3x

Step-by-step explanation:

Parallel lines have the same slope, so the slope of this new line will be the same as the given one.

For a line to pass through the origin it needs to have a y intercept of 0, because the origin is the point (0,0).

6 0
3 years ago
Read 2 more answers
What does 3+5x6-1=? and ill mark as brainliest
inna [77]

Answer:

32

Step-by-step explanation:

3+30-1

33-1

32

6 0
3 years ago
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Then known number in an algebraic expression is
Fed [463]
Unsure of what you're asking.  

If you have an algebraic expression in front of you and see a number there, you could label it as "known" or "a known quantity."  Another word that comes to mind is "constant."
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3 years ago
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