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2 years ago

A skateboard shop has 9 skateboards that sell for $107.99 each. Which is closest to the total cost of all the skateboards?

Mathematics

1 answer:

Kryger [21]2 years ago

3 0

Answer:

971.91

Step-by-step explanation:

you take 107.99 and multiply it by 9 and you will get 971.91

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What is 2,242÷33 Huh huh in 5th grade

dexar [7]

Answer:

67 r 31

Step-by-step explanation:

Here you go.

5 0

2 years ago

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Nendell saw at a diner if he bought one of each item and spent $7.50, how much did the drink cost

Lana71 [14]

All together: 3x + 0.05 + x + x + 0.10 = 7.50

5x + 0.15 = 7.50

5x = 7.35

x = 1.47

1.47 +0.10=1.57

so, the drink costs 1.57

4 0

3 years ago

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In a baseball league consisting of 12 teams, each team plays each of the other teams twice. How many games will be played? There

saul85 [17]

Answer:

132 games played.

Step-by-step explanation:

Let x be the

We have been given that in a baseball league consisting of 12 teams, each team plays each of the other teams twice.

Since there are 12 teams, so each team will play with $(12-1)$ teams except itself.

The total number of games played would be 12 times $(12-1)$ :

$\text{The total number of games played}=12(12-1)$

$\text{The total number of games played}=12(11)$

$\text{The total number of games played}=132$

Therefore, there will be 132 games played.

4 0

2 years ago

Which of the following statements is true of the correlation analysis? The null hypothesis for the Pearson correlation coefficie

ASHA 777 [7]

Answer:

In order to test the hypothesis if the correlation coefficient it's significant we have the following hypothesis:

Null hypothesis: $\rho =0$

Alternative hypothesis: $\rho \neq 0$

The statistic to check the hypothesis is given by:

$t=\frac{r \sqrt{n-2}}{\sqrt{1-r^2}}$

And is distributed with n-2 degreed of freedom. df=n-2=10-2=8

For this case the null hypothesis represent that we don't have association betwen the dependent variable Y and the independent variable X and that means r=0. So then the best option for this case is:

The null hypothesis for the Pearson correlation coefficient states that the correlation coefficient is zero

Step-by-step explanation:

Previous concepts

The correlation coefficient is a "statistical measure that calculates the strength of the relationship between the relative movements of two variables". It's denoted by r and its always between -1 and 1.

And in order to calculate the correlation coefficient we can use this formula:

$r=\frac{n(\sum xy)-(\sum x)(\sum y)}{\sqrt{[n\sum x^2 -(\sum x)^2][n\sum y^2 -(\sum y)^2]}}$

Solution to the problem

In order to test the hypothesis if the correlation coefficient it's significant we have the following hypothesis:

Null hypothesis: $\rho =0$

Alternative hypothesis: $\rho \neq 0$

The statistic to check the hypothesis is given by:

$t=\frac{r \sqrt{n-2}}{\sqrt{1-r^2}}$

And is distributed with n-2 degreed of freedom. df=n-2=10-2=8

For this case the null hypothesis represent that we don't have association betwen the dependent variable Y and the independent variable X and that means r=0. So then the best option for this case is:

The null hypothesis for the Pearson correlation coefficient states that the correlation coefficient is zero

4 0

2 years ago

Solve the inequality then graph: The product of a number and 3 increased by 9 is less than -42

Afina-wow [57]

Answer:

(1/2)n + 9 > 33

Step-by-step explanation:

I hope this helps u

6 0

2 years ago