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emmainna [20.7K]
2 years ago
8

What is the variance for this activity? activity a m b t es ef ls lf 7 1 1.5 2 1.50 8 9.50 8 9.50

Mathematics
1 answer:
Lina20 [59]2 years ago
8 0

The variance for this activity  is  mathematically given as

Var=0.026  

<h3>What is the variance for this activity?</h3>

A data set's variance may be seen as a measurement of the spread that exists between the individual integers. When evaluating the asset allocation of a portfolio, investors employ an expression known as the variance equation.

After careful consideration of the  table given in the question, we have that

Pessimistic time tp=2

optimistic time to=1

most likely time tm=1.5

Generally, the equation for variance is  mathematically given as

\sigma^2=\frac{tp-to}{6}^2

Therefore

\frac{2-1}{6}^2\\\\\sigma^2=1/6^2

Var=0.026  

In conclusion,  the variance for this activity

Var=0.026  

Read more about variance

brainly.com/question/14116780

#SPJ4

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Given the function below, find f(7) f(x)=-x^2+9x
sashaice [31]

Answer:

14

f(x) = 7

-7^2 + 9(7)= -49 + 63 = 14

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Pretend that you can have 100 of any one thing. What would you choose?why?
Shkiper50 [21]
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If 2(4x + 3)/(x - 3)(x + 7) = a/x - 3 + b/x + 7, find the values of a and b.
zmey [24]

Answer:

a=3 and b=5.

Step-by-step explanation:

So I believe the problem is this:

\frac{2(4x+3)}{x-3}(x+7)}=\frac{a}{x-3}+\frac{b}{x+7}

where we are asked to find values for a and b such that the equation holds for any x in the equation's domain.

So I'm actually going to get rid of any domain restrictions by multiplying both sides by (x-3)(x+7).

In other words this will clear the fractions.

\frac{2(4x+3)}{x-3}(x+7)}\cdot(x-3)(x+7)=\frac{a}{x-3}\cdot(x-3)(x+7)+\frac{b}{x+7}(x-3)(x+7)

2(4x+3)=a(x+7)+b(x-3)

As you can see there was some cancellation.

I'm going to plug in -7 for x because x+7 becomes 0 then.

2(4\cdot -7+3)=a(-7+7)+b(-7-3)

2(-28+3)=a(0)+b(-10)

2(-25)=0-10b

-50=-10b

Divide both sides by -10:

\frac{-50}{-10}=b

5=b

Now we have:

2(4x+3)=a(x+7)+b(x-3) with b=5

I notice that x-3 is 0 when x=3. So I'm going to replace x with 3.

2(4\cdot 3+3)=a(3+7)+b(3-3)

2(12+3)=a(10)+b(0)

2(15)=10a+0

30=10a

Divide both sides by 10:

\frac{30}{10}=a

3=a

So a=3 and b=5.

4 0
3 years ago
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A bag contains 2 red, 5 blue, and 3 green marbles. A marble is chosen at random. What is the probability of NOT choosing a red m
Lapatulllka [165]

Step-by-step explanation:

  1. Number of red = 2
  2. Number of blue = 5
  3. Number of green = 3
  • total number of marbles = 10
<h3>probability of not choosing a red marble = 1--choosing a red marble.</h3>

<u>Because</u><u> </u><u>probability</u><u> </u><u>is</u><u> </u><u>always</u><u> </u><u>one</u><u>(</u><u>1</u><u>)</u><u>.</u>

<em>Probability</em><em> </em><em>=</em>

<em>1 -  \frac{2}{10}</em>

<em>\frac{8}{10}</em>

<em>\frac{4}{5}</em>

<em>Is</em><em> </em><em>the</em><em> </em><em>probability</em><em> </em><em>of</em><em> </em><em>not</em><em> </em><em>choosing</em><em> </em><em>a</em><em> </em><em>red</em><em> </em><em>marble</em><em>.</em>

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Answer:

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We can write a proportion

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x pesos      --- $500

x=298*500/25 = 298*20 = 5960 pesos

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