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IgorC [24]
3 years ago
6

Can you please help me!! i will give brainliest!

Mathematics
1 answer:
IgorC [24]3 years ago
8 0

Irrational

Step-by-step explanation:

the square root of 20 is not perfect

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At a football stadium, 4% of the fans in attendance were teenagers. If there were 120 teenagers at the football stadium, what wa
GuDViN [60]

Answer:

3000 people

Step-by-step explanation:

4% teenagers --> 120 teenagers were there

120/4 means 1% so 30 is 1%

1% times 100 is 100% so 30 times 100 equals 100% so 3000 is 100% of the people at the stadium

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Nine less than a number is no more than 8 and is no less than 3
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X - 9 is greater than or equal to 3 and less than or equal to 8. can’t format correctly sorry
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Assuming only the lengths of the sides of a triangle are given, how can you determine if the triangle has a right angle?
saveliy_v [14]

By the Pythagorean Theorem, the lengths of the sides of a triangle satisfy a^2+b^2=c^2 if the triangle is a right triangle (in which case the angle between sides a and b is the right angle).

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3 years ago
An automobile manufacturer has discovered that 20% of all the transmissions it installed in a particular style of truck are defe
Hatshy [7]

Answer:

0.148 = 14.8% probability that they will need to order at least one more new transmission

Step-by-step explanation:

For each transmission, there are only two possible outcomes. Either it is defective after a year of use, or it is not. The probability of a transmission being defective is independent of any other transmission. This means that the binomial probability distribution is used to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

In which C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

And p is the probability of X happening.

20% of all the transmissions it installed in a particular style of truck are defective after a year of use.

This means that p = 0.2

Sold seven trucks:

This means that n = 7

It has two of the new transmissions in stock. What is the probability that they will need to order at least one more new transmission?

This is the probability that at least 3 are defective, that is:

P(X \geq 3) = 1 - P(X < 3)

In which

P(X < 3) = P(X = 0) + P(X = 1) + P(X = 2)

So

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

P(X = 0) = C_{7,0}.(0.2)^{0}.(0.8)^{7} = 0.2097

P(X = 1) = C_{7,1}.(0.2)^{1}.(0.8)^{6} = 0.3670

P(X = 2) = C_{7,2}.(0.2)^{2}.(0.8)^{5} = 0.2753

P(X < 3) = P(X = 0) + P(X = 1) + P(X = 2) = 0.2097 + 0.3670 + 0.2753 = 0.852

P(X \geq 3) = 1 - P(X < 3) = 1 - 0.852 = 0.148

0.148 = 14.8% probability that they will need to order at least one more new transmission

6 0
3 years ago
PLEASE HELP ME ASAP!!!!!!
attashe74 [19]

Answer:

they are vertical angles

Step-by-step explanation:

just learned about this

3 0
3 years ago
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