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3 years ago

Please provide steps

Mathematics

1 answer:

pentagon [3]3 years ago

5 0

1. 15 - 45 age range was the highest in attendance.

2. There are 20 people were between the ages of 5 and 15.

Solution:

The given image is a bar graph of ages of people attending a party.

(1) Highest attendance in age range:

In the bar graph, see the ages of highest pillars.

15 - 25, 25 - 35 and 35 - 45

Starting highest age 15.

Ending highest age 45.

So that 15 - 45 age range was the highest in attendance.

(2) In the 5 - 15 age pillar, see the corresponding frequency.

Frequency is 20.

So, there are 20 people were between the ages of 5 and 15.

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Will give brainliest

Lisa [10]

Answer:

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Step-by-step explanation:

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2nd gardener= 45 divided by 5= 9 bushes

3rd gardener= 80 divided by 10= 8

8 0

3 years ago

Read 2 more answers

What's the answer for 4d - 35= -3

Ket [755]

Answer:

The answer is <u>8</u>.

Step-by-step explanation:

Given:

4d - 35= -3.

Now, the solution:

$4d-35=-3$

Adding both sides by 35 we get:

$4d=-3+35$

$4d=32$

Dividing both sides by 4 we get:

$d=8$

Therefore, the answer is 8.

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3 years ago

Flow meters are installed in urban sewer systems to measure the flows through the pipes. In dry weatherconditions (no rain) the

ziro4ka [17]

Answer:

a) $\frac{(8)(30.23)^2}{20.09} \leq \sigma^2 \leq \frac{(8)(30.23)^2}{1.65}$

$363.90 \leq \sigma^2 \leq 4430.80$

Now we just take square root on both sides of the interval and we got:

$19.08 \leq \sigma \leq 66.56$

b) For this case we are 98% confidence that the true deviation for the population of interest is between 19.08 and 66.56

Step-by-step explanation:

423.6, 487.3, 453.2, 402.9, 483.0, 477.7, 442.3, 418.4, 459.0

Part a

The confidence interval for the population variance is given by the following formula:

$\frac{(n-1)s^2}{\chi^2_{\alpha/2}} \leq \sigma^2 \leq \frac{(n-1)s^2}{\chi^2_{1-\alpha/2}}$

On this case we need to find the sample standard deviation with the following formula:

$s=sqrt{\frac{\sum_{i=1}^8 (x_i -\bar x)^2}{n-1}}
And in order to find the sample mean we just need to use this formula:
[tex]\bar x =\frac{\sum_{i=1}^n x_i}{n}$

The sample deviation for this case is s=30.23

The next step would be calculate the critical values. First we need to calculate the degrees of freedom given by:

$df=n-1=9-1=8$

The Confidence interval is 0.98 or 98%, the value of $\alpha=0.02$ and $\alpha/2 =0.01$ , and the critical values are:

$\chi^2_{\alpha/2}=20.09$

$\chi^2_{1- \alpha/2}=1.65$

And replacing into the formula for the interval we got:

$\frac{(8)(30.23)^2}{20.09} \leq \sigma^2 \leq \frac{(8)(30.23)^2}{1.65}$

$363.90 \leq \sigma^2 \leq 4430.80$

Now we just take square root on both sides of the interval and we got:

$19.08 \leq \sigma \leq 66.56$

Part b

For this case we are 98% confidence that the true deviation for the population of interest is between 19.08 and 66.56

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3 years ago

PLEASE HELP ASAPPP !! Instructions: State what additional information is required in order to know that the triangles are congru

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<h3>Answer: angle T = angle W</h3>

Explanation:

We are given the sides are congruent due to the tickmarks. Specifically

TU = WV (single tickmarks)

TV = WX (double tickmarks)

So we just need the "A" of "SAS". The A is between the two S letters, so the angle is between the two sides. For triangle TUV, the angle T is between the two sides with the tickmarks. Similarly, angle W is between the tickmarked sides of triangle WVX.

If we know that angle T = angle W, then we have enough information to use SAS.

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ehidna [41]

Answer:

y+4x=36

Step-by-step explanation:

the answer isn't in the choice

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3 years ago