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mihalych1998 [28]
2 years ago
12

Please help this is for a big test

Mathematics
1 answer:
maksim [4K]2 years ago
8 0
25 is the answer because of the formula adding and subsequently
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For parallelogram ABCD, find the value of x.<br> 3x + 20<br> B<br> С<br> A А<br> D<br> 5x – 12
Arlecino [84]

Answer:

x = 16

Step-by-step explanation:

5x-12=3x+20

plus 12 both sides

5x=3x+32

-3x both sides

2x=32

divide by 2 both sides

x=16

4 0
2 years ago
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
The quotient of a number and 4 is greater than or equal to 39
bonufazy [111]

x/4 ≥ 9    is the expression you want

4 0
3 years ago
What is the exact value of cos 45degrees as found on the unit circle
AlexFokin [52]

Answer:

sqrt of 2/2

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
50w + 100 ≥ 18000 what is w
faltersainse [42]

Answer:

358

Step-by-step explanation:

set this equal to zero.

subtract 100 from 18000

divide by 50

=358

3 0
2 years ago
Read 2 more answers
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