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3 years ago

A bookshelf holds 6 different biographies and 5 different mystery novels. How many ways can one book of each type be selected?

Mathematics

1 answer:

Yuliya22 [10]3 years ago

7 0

Answer:

Step-by-step explanation:

Each 1 biography has 5 possible mystery novels to choose from so, for each 6 books you could choose out of 5 possible mystery books and with that being said, 5 × 6 = 30

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How much is $800 bonus for a year add to your hourly rate

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Answer:

eine Menge Geld

Step-by-step explanation:

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3 years ago

Write the following linear equations in slope-intercept form:

Vika [28.1K]

Answer:

1) y = 3x - 11

2) y = -2x - 10

3) y = 2x - 5

4) y = -4x + 20

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3 years ago

Read 2 more answers

Toxaphene is an insecticide that has been identified as a pollutant in the Great Lakes ecosystem. To investigate the effect of t

Likurg_2 [28]

Answer:

This data suggest that there is more variability in low-dose weight gains than in control weight gains.

Step-by-step explanation:

Let $\sigma_{1}^{2}$ be the variance for the population of weight gains for rats given a low dose, and $\sigma_{2}^{2}$ the variance for the population of weight gains for control rats whose diet did not include the insecticide.

We want to test $H_{0}: \sigma_{1}^{2} = \sigma_{2}^{2}$ vs $H_{1}: \sigma_{1}^{2} > \sigma_{2}^{2}$ . We have that the sample standard deviation for $n_{2} = 22$ female control rats was $s_{2} = 28$ g and for $n_{1} = 18$ female low-dose rats was $s_{1} = 51$ g. So, we have observed the value

$F = \frac{s_{1}^{2}}{s_{2}^{2}} = \frac{(51)^{2}}{(28)^{2}} = 3.3176$ which comes from a F distribution with $n_{1} - 1 = 18 - 1 = 17$ degrees of freedom (numerator) and $n_{2} - 1 = 22 - 1 = 21$ degrees of freedom (denominator).

As we want carry out a test of hypothesis at the significance level of 0.05, we should find the 95th quantile of the F distribution with 17 and 21 degrees of freedom, this value is 2.1389. The rejection region is given by {F > 2.1389}, because the observed value is 3.3176 > 2.1389, we reject the null hypothesis. So, this data suggest that there is more variability in low-dose weight gains than in control weight gains.

8 0

3 years ago

Given that 1 inch = 2.54 cm, how many centimeters are there in 7 feet? Answers may be written using decimals form and should be

vodomira [7]

Answer:

There are 213.36 centimeters in 7 feet.

Step-by-step explanation:

It is given that:

1 inch = 2.54 cm

We have to find centimeters in 7 feet.

We will convert feet to inches.

1 feet = 12 inches

7 feet = 12*7 = 84 inches

Now,

1 inch = 2.54 cm

84 inches = 2.54 * 84

84 inches = 213.36 cm

Therefore,

There are 213.36 centimeters in 7 feet.

5 0

2 years ago

Preform the subtraction: (5x^2 -3xy +10y^2) - (12x^2 +11xz- 7z^2)

Rzqust [24]

we are given

$(5x^2 -3xy +10y^2) - (12x^2+11xz-7z^2)$

we have to subtract

step-1: Distribute negative sign

$=5x^2 -3xy +10y^2-12x^2-11xz+7z^2$

step-2:Combine like terms

$=5x^2 -12x^2-3xy -11xz+10y^2+7z^2$

$=-7x^2-3xy -11xz+10y^2+7z^2$

we get

$=-7x^2-3xy -11xz+10y^2+7z^2$ ............Answer

3 0

3 years ago