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3 years ago

What is an algebraic expression for this word phrase?

Mathematics

1 answer:

snow_lady [41]3 years ago

3 0

The first choice, 5+7n.

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There are 25 students in Mrs. Venetozzi’s class at the beginning of the school year, and the average number of siblings for each

andrezito [222]

Adding the student with eight siblings will increase the class average amount of siblings because this student has more siblings than the average.

Therefore, the average number of siblings that each student has is larger than the original average.

7 0

3 years ago

A life insurance company sells a $100,000 one year term life insurance policy to a 30-year old male for $475. The probability th

laila [671]

Answer:

The expected value for the insurance company is $392.20.

Step-by-step explanation:

The expected value of a random variable, <em>X</em> is:

$E(X)=x\cdot P(X)$

It is provided that a life insurance company sells a $100,000 one year term life insurance policy to a 30-year old male for $475.

The probability that the male survives the year is, P(S) = 0.999172.

Then the probability that the male does not survives the year is:

P (S') = 1 - P (S)

= 1 - 0.999172

P (S') = 0.000828

The amount the company owes the male if he survives is, S = $475.

The amount the company owes the male if he does not survives is,

S' = $475 - $100,000 = -$99525.

Compute the expected value for the insurance company as follows:

$E(\text{Insurance Company})=S\cdot P(S)+S'\cdot P(S')$

$=(475\times 0.999172)+(-99525\times 0.000828)\\=474.6067-82.4067\\=392.20$

Thus, the expected value for the insurance company is $392.20.

4 0

3 years ago

How do you provide at least 1 equivalent fraction to 4/10

Afina-wow [57]

Multiply num and dem by 2 each to get 8/20

3 0

3 years ago

Read 2 more answers

$384 with a discount of 6.5%

andrey2020 [161]

Answer:

$359.04

Step-by-step explanation:

384 x .935 = 359.04

3 0

3 years ago

Some descriptive statistics for a Set of test scores are shown above for this test a certain student has a standardized score of

Serggg [28]

Complete Question

The complete question is shown on the first uploaded image

Answer:

The score of the student is x = 779.42

Step-by-step explanation:

Generally we can mathematically represent the z-score as

$z = \frac{x - Mean}{ stDev}$

Here x is the score of the student

substituting 1045.7 for the Mean, 221.9 for the stDev and -1.2 for z we have

$-1.2 = \frac{x - 1045.7 }{ 221.9}$

=> $-266.28 = x -1045.7$

=> x = -266.28 + 1045.7

=> x = 779.42

7 0

4 years ago