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3 years ago

12

Please help by Giving out the brainiest

1 answer:

valentina_108 [34]3 years ago

6 0

$x < \frac{17}{5}+\frac{7}{20}$

$x < \frac{15}{4}$

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Plz help I need help with this one question

olya-2409 [2.1K]

Answer: 99 square cm

Step-by-step explanation:

you cut the height in half, so 6 divided by 2 = 3, if you do that you have to do the same to the width, so again 6 divided by 2 = 3, the length stays the same, so the equation would be 3 X 3 X 11 = 99

5 0

3 years ago

Read 2 more answers

Marlon jogs two miles to the park in 25 minutes, turns around, and takes another 55 minutes to walk the same path back to his ho

forsale [732]

Answer:

3 mph

Step-by-step explanation:

So the average speed is simply: $\frac{distance}{time}$ . In case, the total time is 25 minutes + 55 minutes which is a total of 80 minutes, or 1.33 hours. The total distance traveled is two miles + two miles, since he jogged two miles to the park, and then he turns around and walks the same path. So in total he traveled 4 miles. Plugging this in to the formula gives you the equation: $\overline{v}=\frac{4 \text{ miles}}{\frac{4}{3}\text {hours}}=\frac{4\text{ miles}}{1}*\frac{3}{4}\text{ hours} = 3mph$

5 0

2 years ago

We draw a random sample of size 36 from a population with standard deviation 3.5. If the sample mean is 27, what is a 95% confid

inessss [21]

Answer:

The 95% confidence interval for the population mean is between 25.86 and 28.14.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.95}{2} = 0.025$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.025 = 0.975$ , so $z = 1.96$

Now, find the margin of error M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

$M = 1.96\frac{3.5}{\sqrt{36}} = 1.14$

The lower end of the interval is the sample mean subtracted by M. So it is 27 - 1.14 = 25.86

The upper end of the interval is the sample mean added to M. So it is 27 + 1.14 = 28.14

The 95% confidence interval for the population mean is between 25.86 and 28.14.

3 0

3 years ago

Read 2 more answers

Find the equation of the line shown.<br>

trasher [3.6K]

HOPE IT HELPS!!!!!!!!

4 0

3 years ago

Devin volunteers at Big Pup Rescue. He is mixing up shampoo solution for the dog washing station. He needs 2 cups of shampoo con

Naddika [18.5K]

Answer:

8 cups of shampoo concentrate

Step-by-step explanation:

let x=how much shampoo concentrate Devin should add

$\frac{2}{9} =\frac{x}{36}$

cross multiply

2*36=9x

72=9x

72/9=x

x=8

Devin should add 8 cups of shampoo concentrate to the water to make the shampoo solution.

4 0

3 years ago