3 years ago

This may be a silly question but what is 21 divided by 24?

Mathematics

1 answer:

Alex17521 [72]3 years ago

3 0

21 divided by 24 is 0.875. This means that 0.875 is 1/24 of 21.

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Suppose that PR=47. Solve for x and find the lengths of PQ, and QR.

lidiya [134]

Answer:

x = 10

PQ = 27

QR = 20

Step-by-step explanation:

You can add up PQ and QR and set it equal to PR. Solve for x.

(2x + 7) + (2x) = 47

2x + 7 + 2x = 47

4x + 7 = 47

(4x + 7) - 7 = 47 - 7

4x = 40

4x/4 = 40/4

x = 10

Now, use the solved x-value to find PQ and QR.

PQ = 2x + 7

PQ = 2(10) + 7

PQ = 20 + 7

PQ = 27

QR = 2x

QR = 2(10)

QR = 20

6 0

4 years ago

Please help this is kind of confusing

faltersainse [42]

Answer:

Step-by-step explanation:

(2x + 3) + (x - 6) = 180

3x - 3 = 180

3x = 183

x = 61

7 0

3 years ago

Converts 100 inches per minute to feet per minute?

Rudiy27

8 1/3 feet per minute.

Hope it helps :)

5 0

4 years ago

Read 2 more answers

He graph below shows the results of a middle school election for president of the student body.

uranmaximum [27]

Answer:

Step-by-step explanation:

4 0

3 years ago

A random sample of 10 chocolate energy bars of a certain brand has, on average, 230 calories per bar, with a standard deviation

Troyanec [42]

Answer:

The confidence interval for the true mean calorie content is

$215$

Step-by-step explanation:

In this problem we know the mean and standard deviation fo the sample, so we can compute the CI like this:

$\bar{x}-t*s/\sqrt{n}< \mu$

We need to determine t for 10-1=9 degrees of freedom and 99% confidence level. We look up in the t-table and the value for t is 3.2498.

Then we can calculate the limits of the CI:

$\bar{x}-t*s/\sqrt{n}< \mu$

5 0

4 years ago