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katen-ka-za [31]
3 years ago
7

Please help Show workings!

Mathematics
1 answer:
Colt1911 [192]3 years ago
3 0

Answer:

LM = 57

Step-by-step explanation:

For each median (JN, ML and KP), the distance from a vertex to the centroid is twice the distance from the centroid to the midpoint of the side opposite that vertex.

In that case, LQ = 2QM

If LQ = 38 then QM = 19

38 + 19 = 57

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162.50 if this represented a 6.5% increase what is her monthly salary after the raise
Anon25 [30]

9514 1404 393

Answer:

  2662.50

Step-by-step explanation:

Let s represent her old salary. Then we have ...

  0.065s = 162.50

  s = 162.50/0.065 = 2500

Then her new monthly salary is ...

  new salary = old salary + raise

  new salary = 2500 +162.50

  new salary = 2662.50

6 0
3 years ago
How large a sample should be selected to provide a 95% confidence interval with a margin of error of 6? Assume that the populati
marshall27 [118]

Using the z-distribution, it is found that a sample of 171 should be selected.

<h3>What is a z-distribution confidence interval?</h3>

The confidence interval is:

\overline{x} \pm z\frac{\sigma}{\sqrt{n}}

The margin of error is:

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

In which:

  • \overline{x} is the sample mean.
  • z is the critical value.
  • n is the sample size.
  • \sigma is the standard deviation for the population.

For this problem, the parameters are:

z = 1.96, \sigma = 40, M = 6

Hence we solve for n to find the needed sample size.

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

6 = 1.96\frac{40}{\sqrt{n}}

6\sqrt{n} = 40 \times 1.96

\sqrt{n} = \frac{40 \times 1.96}{6}

(\sqrt{n})^2 = \left(\frac{40 \times 1.96}{6}\right)^2

n = 170.7.

Rounding up, a sample of 171 should be selected.

More can be learned about the z-distribution at brainly.com/question/25890103

#SPJ1

4 0
2 years ago
although she's only on middle school, Tamiya loves to drive Go-Karts her favorite place to go drive Go-Karts, Drivers Delight, h
levacccp [35]

Circumference = r * 2 * pi

Circumference of track 1 is 376.8

6 0
3 years ago
Let f(x)=3x2−5x+13 and g(x)=2x−7 . What is g(f(x)) ?
grigory [225]

Option B: 6x^2-10x+19 is the correct answer

Step-by-step explanation:

Given functions are:

f(x) = 3x^2-5x+13\\g(x) = 2x-7

We have to find g(f(x))

So,

g(f(x)) = 2(f(x))-7\\= 2(3x^2-5x+13)-7\\=6x^2-10x+26-7\\= 6x^2-10x+19

Hence,

Option B: 6x^2-10x+19 is the correct answer

Keywords: Functions, Composition

Learn more about functions at:

  • brainly.com/question/5500978
  • brainly.com/question/550017

#LearnwithBrainly

7 0
3 years ago
Any chance anyone can help me if the last question I had post
german
Yes i can the answer would be question
6 0
3 years ago
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