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Viefleur [7K]
3 years ago
5

A sample in which every person in the population being studied has an equal chance of inclusion is called a _____ sample.

Mathematics
1 answer:
Elza [17]3 years ago
8 0
A sample in which every person in the population being studied has an equal chance of inclusion is called a random sample. It is a subset of a statistical population. Each member of the division or portion has an equal probability of being chosen.
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Create an equation to solve for x then solve for x.
Ratling [72]

Answer:

Step-by-step explanation:

In parallelogram adjacent angles are supplementary

∠U +∠V = 180

9x + 15 + 6x + 15 = 180

Combine like terms

9x + 6x + 15 + 15 = 180

          15x + 30 = 180

Subtract 30 from both sides

          15x = 180 - 30

         15x = 150

Divide both sides by 15

            x = 150/15

x = 10

∠U = 9x + 15

      = 9*10 + 15

      = 90 + 15

∠U = 105

∠V = 6x + 15

     = 6*10 + 15

     = 60 + 15

∠V = 75

5 0
3 years ago
Can someone tell me some word problems already solved? dividing and multiplying decimals and integers by 100,10 and 1000. I need
const2013 [10]

Answer:

wait im a little confused sorry but im going to try my best

Step-by-step explanation:

50x2=100. 5×2=10. 500x2=1,000

1,000÷10=100. 100÷10=10. 10,000÷10=1,000

5 0
3 years ago
Write algebraic expressions for each of the following: a. Multiply n by 5 then add 4. b. Add 4 to n then multiply by 5. c. Add 4
kirza4 [7]

Answer:

A. n5+4   B. (4+n)5  C.(4+n)/5    D.(n*n)3   E. (n*3)  2

Step-by-step explanation:

I am not good at explaining but for E. the 2 will be squared but I am not sure how to type it out so Hope this can help  ;)

6 0
3 years ago
Read 2 more answers
Does anyone know the answer to these two problems?
Nady [450]

Answer:

8) -8, -9

9) 4, $ \frac{1}{2} $

Step-by-step explanation:

8) x² + 12x + 27

Solutions of a polynomial means the values of $ x $ such that the polynomial becomes zero. $ i.e., y = 0 $.

We use the following formula to determine the solutions of a quadratic equation of the form: $ ax^2 + bx + c = 0 $

    $ \implies x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a} $

In this equation, $ a = 1; b = 12; c = 27 $

Substituting in the formula, we have:

$ x = \frac{-12 \pm \sqrt{144 - 108}}{2} $

$ \implies x = \frac{-12 \pm 6}{2} $

Taking 2 common outside we get:

$ x = - 6 \pm 3 $

Therefore, we get two solutions viz, x = -3, -9.

9) 2x² - 9x + 4 = y

X- intercepts of a polynomial means the value of x such that y = 0. It means the roots of the polynomial.

Solving the equation using the formula above, we get:

$ x = \frac{-(-9) \pm \sqrt{81 - 32}}{2(2)} $

$ \implies x = \frac{9 \pm 7}{4} $

The values of x = 4, $ \frac{1}{2} $.

Hence, the answer.

8 0
4 years ago
the cost of five different pairs of pants in a department store are $39.99, $31.99, $19.99, $23.99, and $26.99. What is the mean
oksano4ka [1.4K]
Keep in mind that means is the same as asking for the average. all you need to do is add all the values and divide them by the number of values, which is 5

<span>$39.99 +  $31.99 + $19.99 +$23.99 + $26.99= 142.95

mean= 142.95/5 = 28.59</span>
8 0
3 years ago
Read 2 more answers
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