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3 years ago

15

Unit rate word problem,Bridget read a total of 48 books over 12 months.If Bridget has 68 books so far,how many month has she bee

n with her book club

1 answer:

SOVA2 [1]3 years ago

7 0

The correct answer is 17

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If a number is divided into two but such. One part is 10 more than the other is the two parts in the ratio of 5 to 3 find number

alexandr1967 [171]

15 and 25 are the parts, 40 is the number

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2 years ago

Find the common factor of all the terms of the polynomial 10x - 30.

Virty [35]

The common factor in both terms is 10<span />

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3 years ago

The standard deviation of a sample taken from population A is 17.6 for a sample of 25.

lawyer [7]

Answer:

The standard deviation of the sample mean differences is _5.23_

Step-by-step explanation:

We have a sample of a population A and a sample of a population B.

For the sample of population A, the standard deviation $\sigma_A$ is

$\sigma_A = 17.6$

The sample size $n_A$ is:

$n_A = 25$ .

For the sample of population B, the standard deviation $\sigma_B$ is

$\sigma_B = 21.2$

The sample size $n_B$ is:

$n_B = 30$ .

Then the standard deviation for the difference of means has the following form:

$\sigma=\sqrt{\frac{\sigma_A^2}{n_A}+\frac{\sigma_B^2}{n_B}}$

Finally

$\sigma=\sqrt{\frac{17.6^2}{25}+\frac{21.2^2}{30}}\\\\\sigma= 5.23$

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3 years ago

There are 487 books in the classroom library. What is this number rounded to the nearest ten?

DerKrebs [107]

487 rounded to the nearest ten is 490......because 487 is closer to 490 then it is to 480.

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3 years ago

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Which statement could the expression n + 1 represent? one point greater than the last test grade the difference of Gina's score

sukhopar [10]

Answer:

A. One point greater than the last test grade.

Step-by-step explanation:

One point greater than the last test grade can be written as an expression:n + 1

The difference of Gina’s score and one can be written as an expression:

n - 1

The total cost less one dollar can be written as an expression: n - 1

One minute less than Mickey’s previous time can be written as an expression: n - 1

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3 years ago

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