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3 years ago

12

Maggie want to buy several display boxes that hold 8 rocks each. She has $35 to spend. How many display boxes can she buy? Write

a division fact that shows how you found your answer.

1 answer:

Roman55 [17]3 years ago

7 0

35÷8=4.375 or u could just put 4 but the real answer is 4.375

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Two ropes, AD and BD, are tied to a peg on the ground at point D. The other ends of the ropes are tied to points A and B on a fl

BigorU [14]

You have two 30-60-90 triangles, ADC and BDC.

The ratio of the lengths of the sides of a 30-60-90 triangle is

short leg : long leg : hypotenuse
1 : sqrt(3) : 2

Using triangle ADC, we can find length AC.
Using triangle BDC, we can find length BC.
Then AB = AC - BC

First, we find length AC.
Look at triangle ACD.
DC is the short leg opposite the 30-deg angle.
DC = 10sqrt(3)
AC = sqrt(3) * 10sqrt(3) = 3 * 10 = 30

Now, we find length BC.
Look at triangle BCD.
For triangle BCD, the long leg is DC and the short leg is BC.
BC = 10sqrt(3)/sqrt(3) = 10

AB = AC - BC = 30 - 10 = 20

6 0

3 years ago

Read 2 more answers

Claim: The standard deviation of pulse rates of adult males is less than 11 bpm. For a random sample of 132 adult males, the pu

seraphim [82]

Answer:

$\chi^2 =\frac{132-1}{121} 114.49 =123.952$

Step-by-step explanation:

Notation and previous concepts

A chi-square test is "used to test if the variance of a population is equal to a specified value. This test can be either a two-sided test or a one-sided test. The two-sided version tests against the alternative that the true variance is either less than or greater than the specified value"

$n=132$ represent the sample size

$\alpha$ represent the confidence level

$s^2 =10.7^2 =114.49$ represent the sample variance obtained

$\sigma^2_0 =11^2=121$ represent the value that we want to test

Null and alternative hypothesis

On this case we want to check if the population variance specification is violated, so the system of hypothesis would be:

Null Hypothesis: $\sigma^2 \geq 121$

Alternative hypothesis: $\sigma^2$

Calculate the statistic

For this test we can use the following statistic:

$\chi^2 =\frac{n-1}{\sigma^2_0} s^2$

And this statistic is distributed chi square with n-1 degrees of freedom. We have eveything to replace.

$\chi^2 =\frac{132-1}{121} 114.49 =123.952$

Calculate the p value

In order to calculate the p value we need to have in count the degrees of freedom , on this case 131. And since is a right tailed test the p value would be given by:

$p_v =P(\chi^2$

In order to find the p value we can use the following code in excel:

"=1-CHISQ.DIST(123.952,131,TRUE)"

5 0

3 years ago

Answer this question ASAP for points and Brainliest!

Kamila [148]

Step-by-step explanation:

$\frac{1}{5} (10 - 15u) = 2 - 3u$

7 0

3 years ago

How many different ways the letters in personnel can be arranged

Dafna11 [192]

All I see is person but I know it is more

8 0

3 years ago

HELP ASAP NOW the sum of the number, its square root and ots square is 1338. what is the sum of the digits of the number

vesna_86 [32]

The solution is x = 36, and the sum of the digits is 3 + 6 = 9.

<h3>How to find the value of the number?</h3>

We know that, if we define x as the number, we have:

x + x^2 + √x = 1338

Now we need to find the value of x.

Trivially, we can graph the function:

y = x + x^2 + √x

We can see that the solution of x + x^2 + √x = 1338 is

x = 36

36 + 36^2 + √36 = 1338

Then the sum of the digits of the number is 3 + 6 = 9

If you want to learn more about algebra:

brainly.com/question/723406

#SPJ1

8 0

2 years ago