A researcher posts a newspaper advertisement offering $20 in exchange for participation in a short study. The researcher accepts the first five people who respond to the advertisement. Which of the following statements is true about the sample? (5 points) a It is not a valid sample because it is only a short study. b It is a valid sample because money was offered to participants. c It is a valid sample because the first five people were selected to participate. d It is not a valid sample because it is not a random sample of the population.

Answer:

width=x^2-3

Step-by-step explanation:

I think sorry if im wrong

52

Step-by-step explanation:

Answer:

The numbers are 44 and 36

Step-by-step explanation:

n + n - 8 = 80

2n - 8 = 80

2n (- 8 + 8) = 80 + 8

2n = 88

2n/2 = 88/2

n = 44

44 - 8 = 36

Answer:

8516 meters

Step-by-step explanation:

for question 1

Area of Base B =45×25 = 1125 cm²

perimeter of base P = 2(45+25) = 140 cm

Height = 15 cm

Using the formula

Surface area = 2B + Ph

A = 2×1125 + 140×15= 4350 cm²

Voume = Bh = 1125×15= 16875 cm³

For question 2,

Area of base = 7× 5/2= 17.5 cm²

Perimeter of base = (7+7+7) = 21 cm

Surface area = 2B + Ph

Surface area of prism = 2×17.5+ 21×10 = 245cm²

Volume = Bh = 17.5×10 = 175 cm³

Answer:

Step-by-step explanation:

for question 1

Area of Base B =45×25 = 1125 cm²

perimeter of base P = 2(45+25) = 140 cm

Height = 15 cm

Using the formula

Surface area = 2B + Ph

A = 2×1125 + 140×15= 4350 cm²

Voume = Bh = 1125×15= 16875 cm³

For question 2,

Area of base = 7× 5/2= 17.5 cm²

Perimeter of base = (7+7+7) = 21 cm

Surface area = 2B + Ph

Surface area of prism = 2×17.5+ 21×10 = 245cm²

Volume = Bh = 17.5×10 = 175 cm³

Answer:

use a tree diagram to get a visual representation over it then calculate you're probability.

Answer:

D) 120

Step-by-step explanation:

if there are 40 blue marbles and the ratio of blue is 8, then the multiplier is 5

# of red marbles:  11 x 5 = 55

# of pink marbles:  5 x 5 = 25

55 + 40 + 25 = 120

Answer:

What is the total number of students who brought water bottles to lunch?

Step-by-step explanation:

Answer:

What is the total number of students who brought water bottles to lunch?

Step-by-step explanation:

Answer:

D. 252 ounces

Step-by-step explanation:

The number line is cut in fourths. The 3 heaviest boxes are, 1 between 4 and 5 lbs, and 2 boxes between 5 and 6.

1st box: 4.75 lbs

2nd box: 5.5 lbs

3rd box: 5.5 lbs

Total lbs: 15.75 lbs

15.75 pounds= 252 ounces

Answer:

it should be 0.23 cm when rounded to the nearest hundredth

Answer: on paper

Step-by-step explanation:

Answer:

See the picture I included :D

PLease give me brainliest if I helped!

Values if order of longest to shortest.

Answer:

When arranged from lowest to highest, the IQR describes the median 50% of values. The IQR is the difference between the third and first quarters.

Step-by-step explanation:

The linear equation that represents the table is [tex]y = -0.53x + 62.33[/tex]

A linear function is a graph that has a constant rate.

From the table, we have the following ordered pairs

(x,y) = (0,62.33) and (1, 61.8)

Start by calculating the slope (m)

[tex]m = \frac{y_2 -y_1}{x_2-x_1}[/tex]

So, we have:

[tex]m = \frac{61.8 -62.33}{1-0}[/tex]

[tex]m = -0.53[/tex]

The linear equation is then calculated as:

[tex]y = m(x -x_1) + y_1[/tex]

So, we have:

[tex]y = -0.53(x -0) + 62.33[/tex]

Expand

[tex]y = -0.53x + 62.33[/tex]

Hence, the linear equation that represents the table is [tex]y = -0.53x + 62.33[/tex]

Read more about linear equations at:

https://brainly.com/question/14323743

Answer:

Step-by-step explanation:

Answer:

9.15

Step-by-step explanation:

the first one is nine fifteen

Answer:

For x = -6

Step-by-step explanation:

1.5x + 5 = -4

1.5x = -4 - 5

1.5x = -9

x = -6

Checking: 1.5 * -6 + 5 = -4

is there photos for this question? sorry im a lil confused on "what the following" are

Answer:

[tex]( {x}^{2} + 16x + 64) - (x + 8)(x - 4) = k(x + 8) \\ ( {x + 8)}^{2} - (x + 8)(x - 4) = k(x + 8) \\ (x + 8) - (x - 4) = k \\ k = (x - x) + (8 + 4) \\ k = 12[/tex]

Answer:

Step-by-step explanation:

a² + 2ab + b² = (a + b)²

2ab = 2 * x * 8 = 16x

x²  + 16x + 64 = x² + 2* x * 8 + 8²  

                      = (x + 8)²

x² + 16x + 8 - (x +8)(x - 4) = (x+8)² - (x+ 8) (x -4)

                                        = (x +8)(x +8) - (x + 8)(x - 4)

(x +8 ) is common in both terms

                                        = (x + 8) [ (x + 8) - (x - 4) ]

                                        = (x + 8) [ x + 8 - x + 4 ]  

{Combine like terms. so x + (-x ) = 0   and 8 +4 = 12}

                                         = (x + 8) [ 12]

k = 12

Answer: Choice B

(3+4) + 2 = 3 + (4+2)

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Explanation:

The general rule for the associative property of addition is

(a+b)+c = a+(b+c)

the a,b,c stay in the same order from left to right. The only thing that changes is the way we group the pair of terms. On the left side, we have a & b together with c left out. Then on the right side, we have b & c together with 'a' excluded.

Addition of any group of numbers can be done in any order, which is why this property is valid (though perhaps there's a more rigorous proof out there). For this specific problem, a = 3, b = 4, and c = 2.

Answer: I think the answer to your question is option B.

Answer:

x=29 CEF=103 BEF=58

Step-by-step explanation:

161=3x+16+2x

5x=145

x=29