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Andrei [34K]
3 years ago
7

Find the value of x. (Hint: Use a trigonometric ratio or what you know about the lengths of sides in special right triangles.)

Mathematics
2 answers:
Leona [35]3 years ago
7 0
Tan 45 = perpendicular/base 

1= 9 / x

x= 9 units
lions [1.4K]3 years ago
4 0
Since all triangles have a sum of 180° and this is a right triangle with a 90 and a 45.  The other angle must be 45.  Since the side opposite the 45 is 9 units long, and the x is opposite the same angle it must also have a length of 9 units.

x=9
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kenny6666 [7]

Answer:

the probability that there will be a seat available for every passenger who shows up is 0.74

Step-by-step explanation:

if the probability of choosing a passenger that will not show up is 5% , then the probability of choosing a passenger that will show up is 95%.

Denoting event X= x passengers will show up from the total of 52 that purchased the ticket

Then P(X) follows a binomial probability distribution, since each passenger is independent from others. Thus

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n= total number of passengers hat purchased the ticket= 52

p= probability of choosing a passenger that will show up

x = number of passengers that will show up

therefore the probability that the number does not exceed the limit of 50 passengers is:

P(X≤50)=  ∑P(X=i)  from i=0 to i=50   =F(50)

where F(x) is the cumulative binomial probability distribution, then from tables:

P(X≤50)= F(50) = 0.74

therefore the probability that there will be a seat available for every passenger who shows up is 0.74

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