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DerKrebs [107]
3 years ago
12

Please show your work thank you

Mathematics
1 answer:
AlladinOne [14]3 years ago
4 0

 

\displaystyle\\\frac{LM}{QP}=\frac{NL}{RQ}\\\\\frac{8}{12}=\frac{x+7}{2x+5}\\\\8(2x+5)=12(x+7)\\16x+40=12x+84\\16x-12x=84-40\\4x=44\\\\x=\frac{44}{4}\\\\\boxed{x=11}\\RQ=2\cdot11+5=22+5\\\boxed{\bf RQ=27~~correct~answer: ~C.}\\\\NL=11+7 = 18\\MN=11+5=16\\PR=2\cdot11+2=22+2=24

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t = d/v = d/6.6

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What are the answers of these and if work is needed please explain? Thank you
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A woman in a highland village in the Andes knits sweaters and sells them for export. She also takes care of her family and helps
Mnenie [13.5K]

Answer:

Expected number of sweaters per month can be given as follows:

E(X) = Σ x P(X = x)

Now,

E(X) = [2 * 0.1 + 3* 0.1+ 4* 0.2 + 5* 0.3 + 6* 0.2 + 7 * 0.1]

E(X) = 4.7.

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     We have E(X) = 4.7. Thus, [E(X)]2= 4.7*4.7 = 22.09.

Now E(X^2) = [2*2 * 0.1 + 3*3* 0.1+ 4*4* 0.2 + 5*5* 0.3 + 6*6* 0.2 + 7*7*0.1]

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Given that exporter pays the $12 for each sweater. The woman pays $2 per sweater. The cost of shipment is $3 irrespective of the number of sweaters. Now, let m is the number of sweaters she made. Thus, the total cost she would have to pay would be

Total cost by woman = 2m+3

The total cost paid by the exporter would be = 12m.

Now the profit of woman would be given by,

                  = The total cost exporter pay – cost paid by the woman

                 = 12m – (2m +3)

                 = 12m – 2m -3

                 = 10m – 3.

Now expected profit made by the woman is given in the following table below:

E(Profit) = Σ profit* P(X = x)

In a similar way, as we have done in part (a).

E(Profit) = [17 * 0.1 + 27* 0.1+ 37* 0.2 + 47* 0.3 + 57* 0.2 + 67 * 0.1]

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Var(profit) =

E(profit^2) = [17*17 * 0.1 + 27*27* 0.1+ 37*37* 0.2 + 47*47* 0.3 + 57*57* 0.2 + 67*67*0.1]

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[E(profit)]^2 = 44*44 = 1936.

Thus, the variance can be given as =

Var(profit)= 2137 – 1936

Var(profit) = 201.

6 0
3 years ago
Find f(2) if f(x)=2x+1
Finger [1]

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The answer is:  " 27.5 pages " ; or, write as:  " 27 \frac{1}{2} pages " .
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5.5 pages / 12 minute = ? pages / 60 minutes; 


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5.5 * 5 =   27.5
____________________________________________________________
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