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4 years ago

Need help asap Any help ?

Mathematics

1 answer:

V125BC [204]4 years ago

5 0

I hope this helps you

in that right triangle

30=x

60=x square root of 3

90=x

regular hexagon one side=2x

Area=(2x)^2square root of 3/4.6

Area =4x^2.square root of 3/4.6

Area =6x^2square root of 3

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The perimeter of a flag is 460 feet the length of it is 90 feet greater than the width. What is the width?

Svetlanka [38]

Answer:

The width of the flag is 70 ft.

Step-by-step explanation:

The shape of a flag is mostly rectangular.

The perimeter of a rectangle is,

$Perimeter =2(l+w)$

Given:

Perimeter of flag = 460 ft.

Width = w

Length (l) = 90 + w

Determine the value of width as follows:

$460=2(90+w+w)\\\frac{460}{2} =90+2w\\230-90=2w\\w=\frac{140}{2}\\ =70$

Thus, the width of the flag is 70 ft.

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4 years ago

4.8n + 3.2n simply the expression mathematics

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4.3+3.2 is 8

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3 years ago

Read 2 more answers

Seventy-two percent of the light aircraft that disappear while in flight in a certain country are subsequently discovered. Of th

Anton [14]

Answer:

a) 0.105 = 10.5% probability that it will not be discovered if it has an emergency locator.

b) 0.522 = 52.2% probability that it will be discovered if it does not have an emergency locator.

c) 0.064 = 6.4% probability that 7 of them are discovered.

Step-by-step explanation:

For itens a and b, we use conditional probability.

For item c, we use the binomial distribution along with the conditional probability.

Conditional Probability

We use the conditional probability formula to solve this question. It is

$P(B|A) = \frac{P(A \cap B)}{P(A)}$

In which

P(B|A) is the probability of event B happening, given that A happened.

$P(A \cap B)$ is the probability of both A and B happening.

P(A) is the probability of A happening.

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.

a) If it has an emergency locator, what is the probability that it will not be discovered?

Event A: Has an emergency locator

Event B: Not located.

Probability of having an emergency locator:

66% of 72%(Are discovered).

20% of 100 - 72 = 28%(not discovered). So

$P(A) = 0.66*0.72 + 0.2*0.28 = 0.5312$

Probability of having an emergency locator and not being discovered:

20% of 28%. So

$P(A cap B) = 0.2*0.28 = 0.056$

Probability:

$P(B|A) = \frac{P(A \cap B)}{P(A)} = \frac{0.056}{0.5312} = 0.105$

0.105 = 10.5% probability that it will not be discovered if it has an emergency locator.

b) If it does not have an emergency locator, what is the probability that it will be discovered?

Probability of not having an emergency locator:

0.5312 of having. So

$P(A) = 1 - 0.5312 = 0.4688$

Probability of not having an emergency locator and being discovered:

34% of 72%. So

$P(A \cap B) = 0.34*0.72 = 0.2448$

Probability:

$P(B|A) = \frac{P(A \cap B)}{P(A)} = \frac{0.2448}{0.4688} = 0.522$

0.522 = 52.2% probability that it will be discovered if it does not have an emergency locator.

c) If we consider 10 light aircraft that disappeared in flight with an emergency recorder, what is the probability that 7 of them are discovered?

p is the probability of being discovered with the emergency recorder:

0.5312 probability of having the emergency recorder.

Probability of having the emergency recorder and being located:

66% of 72%. So

$P(A \cap B) = 0.66*0.72 = 0.4752$

Probability of being discovered, given that it has the emergency recorder:

$p = P(B|A) = \frac{P(A \cap B)}{P(A)} = \frac{0.4752}{0.5312} = 0.8946$

This question asks for P(X = 7) when $n = 10$ . So

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

$P(X = 7) = C_{10,7}.(0.8946)^{7}.(0.1054)^{3} = 0.064$

0.064 = 6.4% probability that 7 of them are discovered.

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3 years ago

F(x)=7-2x polynomial function

monitta

Answer:

Step-by-step explanation:

Yes, F(x)=7-2x is a polynomial function for which the sole x term has the exponent 1 and the constant term has the exponent 0:

F(x) = -2x^1 + 7x^0

As is true of all polynomial functions, the exponents are all positive integers (plus that of the constant term is zero).

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3 years ago

The graph shows the relationship between the number of gallons of water and time (in mins) g= gallons of water 12 10 8 6 4 2 and

alexandr1967 [171]

Answer:

Do you still need help??

Step-by-step explanation:

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3 years ago