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shutvik [7]
3 years ago
14

PLEASE HELP ME ASAP I NEED ANSWERS PLEASEEE

Mathematics
1 answer:
OLEGan [10]3 years ago
6 0

Answer:

p= 21

Explanation:

FIRST DO

3(21) -7

3 × 21 = 63

63 - 7 = 56

THEN DO

6(21) - 2

6 × 21 = 126

126 - 2 =  124

FINALLY

It needs to add up to 180°

124 + 56 = 180°

Therefore, the value of p = 21

Hope this helps!!! :)

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Kail Ryans 10 laps around the track each day each lap around the track is 400 m meters how many times around the track will she
Semmy [17]
Hello

1 km = 1000 m

12 km = 12,000 m

Each day, she runs 10 * 400 m = 4000 m

12,000 m / 4000 m = 3

It will take 3 days.

Have a nice day
5 0
3 years ago
15. The table below shows the various ways
Kipish [7]

Answer:

45 %  

Step-by-step explanation:

\begin{array}{lc}\textbf{Method} & \textbf{Number}\\\text{Walk} & 36 \\\text{Bus} & 26 \\\text{Car} & 18 \\\text{TOTAL} & \mathbf{80} \\\end{array}\\\text{Percent of walkers} = \dfrac{36}{80} \times 100 \% = \mathbf{45 \, \%}

7 0
3 years ago
Read 2 more answers
If you want to be 95​% confident of estimating the population mean to within a sampling error of plus or minus3 and the standard
Aleksandr [31]

Answer:

The sample size required is at least 171

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.

What sample size is​ required?

A samle size of at least n is required, in which n is found when M = 3, \sigma = 20

So

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

3 = 1.96*\frac{20}{\sqrt{n}}

3\sqrt{n} = 20*1.96

\sqrt{n} = \frac{20*1.96}{3}

(\sqrt{n})^{2} = (\frac{20*1.96}{3})^{2}

n = 170.7

Rouding up

The sample size required is at least 171

5 0
3 years ago
What is the graph of the solution to the following compound inequality?
ohaa [14]

Answer:

<h2>C.</h2>

Step-by-step explanation:

<, > - open circle

≤, ≥ - solid circle

<, ≤ - draw to the left

>, ≥ - draw to the right

3-x\geq2\qquad\text{subtract 3 from both sides}\\\\-x\geq-1\qquad\text{change the signs}\\\\\boxed{x\leq1}\\\\4x+2\geq10\qquad\text{subtract 2 from both sides}\\\\4x\geq8\qquad\text{divide both sides by 4}\\\\\boxed{x\geq2}

3 0
3 years ago
Help please and thank you!
9966 [12]

Answer:

x = 29°

Step-by-step explanation:

4 0
2 years ago
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