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3 years ago

Please help thanks!!!

Mathematics

2 answers:

Julli [10]3 years ago

5 0

The first one is the answer

VladimirAG [237]3 years ago

4 0

Answer:

2x+8

Step-by-step explanation:

So when they say a number, they mean a unknown value.

We can use a variable as this unknown value. In this situration we can call it x.

This phase says "twice a number" or "twice x". This can be though of as 2x.

next it says this number is increased by 8. When they say increased they meanm added to.

So 8 is added to 2x. Or 2x + 8

So its the second answer, 2x+8.

Hope this helps!

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Answer:

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Step-by-step explanation:

a^2 + b^2 = c^2

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3 years ago

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2 years ago

Read 2 more answers

A new test has been developed to detect a particular type of cancer. The test must be evaluated before it is put into use. A med

Troyanec [42]

The tree diagram of the problem above is attached
There are four outcomes of the two events,

First test - Cancer, Second Test - Cancer, the probability is 0.0396
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First test - No cancer, Second Test - No cancer, the probability is 0.9054

The probability of someone picked at random has cancer given that test result indicates cancer is $\frac{0.0396}{0.0396+0.0096}= \frac{33}{41}$

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3 years ago

1.) The commuter trains on the Red Line for the Regional Transit Authority (RTA) in Cleveland, OH, have a waiting time during pe

alisha [4.7K]

Answer:

a) For this case we define the random variable as X ="waiting time during peak hours" and we know that this distribution follows an uniform distribution:

$X \sim Unif(a=0,b=8)$

Where a and b represent the limits of the distribution.

b) $f(x) = \frac{1}{8}= 0.125, a\leq x \leq b$

And the height for this case would be 0.125

Step-by-step explanation:

Part a

For this case we define the random variable as X ="waiting time during peak hours" and we know that this distribution follows an uniform distribution:

$X \sim Unif(a=0,b=8)$

Where a and b represent the limits of the distribution.

Part b

For this case the density function would be given by:

$f(x) = \frac{1}{8}= 0.125, a\leq x \leq b$

And the height for this case would be 0.125

And $f(x)= 0$ for other case.