What is the value of a in the equation 3a + b = 54, when b = 9?

A tennis court is 24 m long and 11 m wide. What is the perimeter of a tennis court? A. 78 m B. 70 m C.264 m D.35 m

scoundrel [369]

The answer is B..........................................................

6 0

3 years ago

Read 2 more answers

Please help i'm desperate!!

Leya [2.2K]

I’m not sure maybe if there was an imagine I’d be able to answer this question.

6 0

2 years ago

A psychologist is interested in knowing whether adults who were bullied as children differ from the general population in terms

MissTica

Answer:

$t = \frac{39.5-30.6}{\frac{6.6}{\sqrt{25}}}= 6.74$

The degrees of freedom are given by:

$df =n-1= 25-1=24$

Now we can calculate the p value with the following probability:

$p_v = 2*P(t_{24}>6.74)= 5.69x10^{-7}$

And for this case since the p value is lower compared to the significance level $\alpha=0.05$ we can reject the null hypothesis and we can conclude that the true mean for this case is different from 30.6 at the significance level of 0.05

Step-by-step explanation:

For this case we have the following info given:

$\bar X = 39.5$ represent the sample mean

$s =6.6$ represent the sample deviation

$\mu = 30.6$ represent the reference value to test.

$n = 25$ represent the sample size selected

The statistic for this case is given by:

$t =\frac{\bar X -\mu}{\frac{s}{\sqrt{n}}}$

And replacing we got:

$t = \frac{39.5-30.6}{\frac{6.6}{\sqrt{25}}}= 6.74$

The degrees of freedom are given by:

$df =n-1= 25-1=24$

Now we can calculate the p value with the following probability:

$p_v = 2*P(t_{24}>6.74)= 5.69x10^{-7}$

And for this case since the p value is lower compared to the significance level $\alpha=0.05$ we can reject the null hypothesis and we can conclude that the true mean for this case is different from 30.6 at the significance level of 0.05

3 0

3 years ago

The principal would like to assemble a committee of 6 students from the 11-member

lapo4ka [179]

Answer: one

Step-by-step explanation: 11/6 = 1 r5

8 0

3 years ago

A copy machine makes 171 coies in 4 minutes and 45 seconds. How many copies does it make per minute?

Jobisdone [24]

Answer:

36

Step-by-step explanation:

171/(4+0.75) =36

you want it to be in minutes, so calculate the 45 seconds over 60 seconds, which is 0.75. Add that to the 4 minutes, and divide the total number of copies over the time used, and you have speed/minute.

3 0

3 years ago