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Ksenya-84 [330]
3 years ago
15

IDK how to do this!! Please help!

Mathematics
1 answer:
ollegr [7]3 years ago
6 0

Answer:

PR = 8

ST = 5

Please read the explanation below so next time you can do it yourself instead of resorting to an online answers forum. Enjoy~

Step-by-step explanation:

In the left side triangle, I know that triangles PQS and PRS are congruent, so PQ and PR measures must be equivalent.

This is because of SAS (Side Angle Side) theorem. The marked congruent sides (QS and RS), the right angle, and the shared side PS make the triangles congruent.

Using CPCTC (Corresponding Parts of Congruent Triangles are Congruent), PQ and PR are congruent, and therefore PR is 8.

Moving on to triangle on the right side. The triangles VST and VUT are congruent by AAS theorem (Angle Angle Side).

Using CPCTC again, ST and UT are congruent. This makes the equation:

5z = 2z+3

Easy Algebra from here. -2z both sides, making:

3z = 3

Then divide:

z = 1

Plug in z and now you got:

ST and UT = 5

There you go! Not sure if you read this but eh. You're welcome :)

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Your uncle has 36 coins in nickels and quarters. The value of his nickels is 1/15 of the value of his quarters. Find the number
Ostrovityanka [42]

Answer:i

Step-by-step explanation:

Total coin = 36

Let the no. Of quarter = x

No. Of nickel = 1/15 × x = x/15

So, x + x/15 = 36

Multiply each terms by 15

15x + x = 540

16x = 540

x = 540/16

x = 33.75

Nickel is x/15 = 33.75/15 = 2.25

3 0
3 years ago
Tthe tempature in the morning was -3 degrees if it rose 8 degrees before lunch what was the temperature at the linch time
Nikolay [14]

Answer:

it rose to 5 degrees

Step-by-step explanation:

4 0
2 years ago
You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable estimate for the
Vesna [10]

Answer:

A sample size of at least 1,353,733 is required.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of , and a confidence level of , we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of .

The margin of error is:

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

98% confidence level

So \alpha = 0.02, z is the value of Z that has a pvalue of 1 - \frac{0.02}{2} = 0.99, so Z = 2.327.  

You would like to be 98% confident that you esimate is within 0.1% of the true population proportion. How large of a sample size is required?

We need a sample size of at least n.

n is found when M = 0.001.

Since we don't have an estimate for the proportion, we use the worst case scenario, that is \pi = 0.5

So

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

0.001 = 2.327\sqrt{\frac{0.5*0.5}{n}}

0.001\sqrt{n} = 2.327*0.5

\sqrt{n} = \frac{2.327*0.5}{0.001}

(\sqrt{n})^{2} = (\frac{2.327*0.5}{0.001})^{2}

n = 1353732.25

Rounding up

A sample size of at least 1,353,733 is required.

5 0
4 years ago
Suppose 12% of students surveyed said they have tried riding a zip line.
Arisa [49]

Answer:

12.

12% of 100= 12.

6 0
3 years ago
Select all answers that have a value of 22?? Help..
Tom [10]

Let's plug in the variables one by one.

6g - 2h

plug in 5 for g and 4 for h

6(5) - 2(4)

multiply

30 - 8

subtract

→ 22

20g

plug in 2 for g

20(2)

multiply

40

2(g + 1)

plug in 10 for g

2(10 + 1)

add

2(11)

multiply

→ 22

4g + 5h

plug in 1 for g and 4 for h

4(1) + 5(4)

multiply

4 + 20

add

24

Therefore, the answers that have a value of 22 are 6g - 2h and 2(g + 1)

6 0
4 years ago
Read 2 more answers
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