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Stolb23 [73]
3 years ago
7

Where does the line y = -4x + 9 cross the y-axis?

Mathematics
1 answer:
Zanzabum3 years ago
7 0

Answer:

slope is -4 y-axis is 9

Step-by-step explanation:

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Ruby has a bird feeder which is visited by an average of 13 birds every 2 hours during daylight hours. What is the probability t
zalisa [80]

Answer:

62.93%

Step-by-step explanation:

We have to solve it by a Poisson distribution, where:

p (x = n) = e ^ (- l) * l ^ (x) / x!

Where he would come being the number of birds that there would be in 40 minutes, we know that in 2 hours, that is 120 minutes there are 13, therefore in 40 there would be:

l = 13 * 40/120

l = 4,333

Now, we have p (x> 3) and that is equal to:

p (x> 3) = 1 - p (x <= 3)

So, we calculate the probability from 0 to 3:

 p (x = 0) = 2.72 ^ (- 4.33) * 4.33 ^ (0) / 0! = 0.01313

p (x = 1) = 2.72 ^ (- 4.33) * 4.33 ^ (1) / 1! = 0.0568

p (x = 2) = 2.72 ^ (- 4.33) * 4.33 ^ (2) / 2! = 0.12310

p (x = 3) = 2.72 ^ (- 4.33) * 4.33 ^ (3) / 3! = 0.17767

If we add each one:

0.01313 + 0.0568 + 0.12310 + 0.17767 = 0.3707

replacing:

p (x> 3) = 1 - 0.3707

p (x> 3) = 0.6293

Which means that the probability is 62.93%

5 0
3 years ago
What 2 numbers equal -80
mina [271]
-10 and 8 multiply them to equal 80 but if there both negative it will be a positive 80 because if you multiply 2 negatives its postive hope this helps
4 0
3 years ago
Read 2 more answers
A student needs to collect exactly 20 insects for a science project. The student has already collected 13 insects. Write an equa
sergeinik [125]

Answer:

The answer is c: N + 13 = 20

Step-by-step explanation:

8 0
3 years ago
How do I draw perpendicular line
taurus [48]

Answer:

Follow these steps and you will find how to make a perpendicular line.

Step-by-step explanation:

Open the compass to a radius less than half the segment.

Draw two arcs intersecting the line on both sides of the point.

Draw two arcs using the intersection points as the centers. ...

Construct a line between this point and the original point.

Hope this helped :) -ish

5 0
2 years ago
Ann can run 27 miles in 3 hours.What is average speed in miles per hour?​
charle [14.2K]

Step-by-step explanation:

To find the average speed, you divide miles by hours.

27/3

So the average speed in miles per hour is 9.

Hope it helps!

8 0
3 years ago
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