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3 years ago

Please Help!! 10 Points! Brainliest Answer

Mathematics

1 answer:

Ivenika [448]3 years ago

6 0

The correct answer is D because you already have one side and one angle that are equal so you need one more side

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Identify the y-intercept of the line y=5x-1

IrinaVladis [17]

Answer: its 1

Step-by-step explanation:

3 0

3 years ago

Find two numbers if their sum is 91 and the ratio is 6:7?

Archy [21]

Answer:

The numbers are 42 and 49

Step-by-step explanation:

Let's make it into a simple equation. Make the ratios into a single variable like this: 6x+7x=91. If you simplify it more you would get 13x=91. From here divide both sides by 13. This will result with x being 7. But the problem wants you to find 6x and 7x. If you multiply 7 with 6 you would have an answer of 42. If you multiply 7 with 7 you get 49. If you want to check add 42 and 49. If you get 91, this means that the answer is correct

7 0

3 years ago

A researcher wants to know if the average time in jail for robbery has increased from what it was several years ago when the ave

seropon [69]

Answer:

The interval is : (7.206 , 7.794)

Step-by-step explanation:

The mean is = 7.5

Standard deviation = 3

n = 400

At 95% confidence interval, the z score is 1.96

$7.5+1.96(\frac{3}{\sqrt{400} } )$

And $7.5-1.96(\frac{3}{\sqrt{400} } )$

$7.5+0.294$ and $7.5-0.294$

So, the interval is : (7.206 , 7.794)

4 0

4 years ago

Data collected at Toronto Pearson International Airport suggest that an exponential distribution with mean value 2,725 hours is

Rzqust [24]

Answer:

$P(X >2)$

And we can calculate this with the complement rule like this:

$P(X>2) = 1-P(X$

And using the cdf we got:

$P(X>2) = 1- [1- e^{-\lambda x}] = e^{-\lambda x} = e^{-\frac{1}{2.725} *2}= 0.480$

Step-by-step explanation:

Previous concepts

The exponential distribution is "the probability distribution of the time between events in a Poisson process (a process in which events occur continuously and independently at a constant average rate). It is a particular case of the gamma distribution". The probability density function is given by:

$P(X=x)=\lambda e^{-\lambda x}, x>0$

And 0 for other case. Let X the random variable of interest:

$X \sim Exp(\lambda=\frac{1}{2.725})$

Solution to the problem

We want to calculate this probability:

$P(X >2)$

And we can calculate this with the complement rule like this:

$P(X>2) = 1-P(X$

And using the cdf we got:

$P(X>2) = 1- [1- e^{-\lambda x}] = e^{-\lambda x} = e^{-\frac{1}{2.725} *2}= 0.480$

8 0

3 years ago

Triangle XYZ has vertices at X(–2, –1), Y(–3, –6), and Z(–7, –5). If triangle XYZ is rotated 90° clockwise, what will be the coo

Delvig [45]

Answer:1. Is right 3 down 5, because to get from x(0,0) to x'(3,-5), you need I shift to the right 3 and downwards 5.

2. Counterclockwise 180 degrees. This is because 180 degrees is half of a full rotation (360 degrees), meaning the point would be the same no matter which way you rotated 180 degrees.

3. Clockwise 90 degrees. Going counter clock wise 270 degrees is like going around 3/4 of a circle (because 270/360 is 3/4). Just as well, going clock wise 90 degrees is like going 1/4 of the circle, but in the opposite direction. This means they will both land at the same point.

Hope this Helps!

Step-by-step explanation:

8 0

3 years ago

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