PLZ HELP IF WRONG ILL REPORT
Best Buy wants to know whether customers liked the televisions they purchased from the store in the past year.

The store calls and asks every 4th person who bought a television within the past year whether he or she likes it.



Is this sample biased or unbiased? Please explain your reasoning! (Tell why)

..

............................

Answer:

y = 4x +2

Step-by-step explanation:

The formula/equation for slope-intercept form is: y=mx+b. M stands for slope and b stands for the y-intercept.

In this question, you're already given the slope, 4, so luckily, you don't need to find that. However, you need to find the y-intercept, or otherwise known as b in the slope-intercept formula.

Given coordinates: (6, 26) ---> (6 is the x-intercept, and 26 is the y-intercept)

Slope: 4

Plug those values into y=mx+b

26 = 4(6) + b

26 = 24 + b

Subtract 24 on both sides to isolate out b.

2 = b

Now that you've found the y-intercept, plug in your stuff to form your slope-intercept equation/formula.

y = 4x + 2

Answer:

Scalene Triangle

Step.-by-step explanation:

Calculate the lengths of the sides:

Side 1 = √((4-3)^2+(7-2)^2) = √26.

Side 2 = √((6-7)^2+(5-4)^2) = √2.

Side 3 = √((6-2)^2+(5-3)^2) = √20.

So each side is different in length and so its a scalene triangle.

Answer:

y=3x+(-4

Step-by-step explanation:

when it zero you can easily get the starting point so it -4

and i notice it 3 because 3×2 equals 6-4 equals 2

Answer:

A. (0, 60)

B. 15x

Step-by-step explanation:

The initial value is the same as the y-intercept, which is 60 or (0, 60).

The rate of change would be the same as the slope. To find the slope, you do rise/run. You move 15 units up, and 1 to the right. That would be 15x.

Hope this helps!

Answer: should be 1/16 ?

Step-by-step explanation:

Answer:

[tex] (\frac{1}{2} ) {}^{4} = \frac{1}{ {2}^{4} } = \frac{1}{16} [/tex]

is a required answer.

Answer:

a. 0.4364 = 43.64% probability that the total of their scores is above 260.

b. 0.0351 = 3.51% probability that Jeff's score is higher.

Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the z-score of a measure X is given by:

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

Sum/Subtraction between normal variables:

When two normal variables are added/subtracted, the mean is the sum/subtraction of the means, while the standard deviation is the square root of the sum of the variances.

a. the total of their scores is above 260.

Mean is the sum of the means, so:

[tex]\mu = 100 + 155 = 255[/tex]

Standard deviation is the square root of the sum of the variances. So

[tex]\sigma = \sqrt{21^2+22^2} = 30.4[/tex]

The probability is 1 subtracted by the p-value of Z when X = 260. So

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

[tex]Z = \frac{260 - 255}{30.4}[/tex]

[tex]Z = 0.16[/tex]

[tex]Z = 0.16[/tex] has a p-value of 0.5636

1 - 0.5636 = 0.4364

0.4364 = 43.64% probability that the total of their scores is above 260.

b. Jeff's score is higher.

Jeff's mean is of 100, while Pam's is of 155. The probability of Jeff's score being higher is the probability that the subtraction is above 0. The mean is:

[tex]\mu = 100 - 155 = -55[/tex]

The probability is 1 subtracted by the p-value of Z when X = 0. So

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

[tex]Z = \frac{0 - (-55)}{30.4}[/tex]

[tex]Z = 1.81[/tex]

[tex]Z = 1.81[/tex] has a p-value of 0.9649.

1 - 0.9649 = 0.0351

0.0351 = 3.51% probability that Jeff's score is higher.

Answer:

13

Step-by-step explanation:

9514 1404 393

Answer:

  24

Step-by-step explanation:

Assuming that making the cut does not change the total length of the board, each foot can be divided into two pieces that are 1/2 foot. The number of pieces will be ...

  (12 ft)/(1/2 ft/piece) = (12×2) pieces = 24 pieces

Ross can make 24 pieces that are 1/2 ft long from her board.

Answer:

x^3(4x-1)(4x+1)

Step-by-step explanation:

Given data

We have the expression

16x^5– x^3

x^3 is a common factor to both terms in the above expression

x^3(16x^2-1)

(16x^2-1) is equal to (4x-1)(4x+1)

x^3(4x-1)(4x-1)

Hence the factored expression is x^3(4x-1)(4x+1)

Answer:

6 is in the tenths place.

Step-by-step explanation:

Each digit is a number has a place, and we start counting from left to the right.

52469

9 is in the units place

6 is in the tenths place.

4 is in the cents place.

2 is the thousandths place.

5 is in the ten thousandths place.

The question asks 6, which is in the tenths place.

Answer: 90% of people marry there 7th grade love. since u have read this, u will be told good news tonight. if u don't pass this on nine comments your worst week starts now this isn't fake. apparently if u copy and paste this on ten comments in the next ten minutes you will have the best day of your life tomorrow. you will either get kissed or asked out in the next 53 minutes someone will say i love you.

Step-by-step explanation:

Answer:

A = 533.8 square inches

Step-by-step explanation:

Use the surface area of a cylinder formula (A=2πrh+2πr^2)

Plug in 12 for h and 5 for r

Use 3.14 in replace for π

A = 2(3.14)(5)(12) + 2(3.14)(5)^2

A = 533.8 in^2

Step-by-step explanation:

55 square inches tall is the average cost of a house in the morning po everything is the same as

Answer:

7: 2/11

8: 4/11

9: 5/11

10: 6/11

11: 9/11

12: 7/11

Answer:

35.94 lb

Step-by-step explanation:

The net mass flow rate dm/dt = flow rate in - flow rate out

mass flow rate in = concentration in × volume flow rate in = 0.4 lb/gallon of salt × 5 gal/min = 2 lb/min

Let m(t) be the mass present at time, t.

So, the concentration at time, t = m(t)/volume of tank = m(t)/100

mass flow rate out = concentration out × volume flow rate out = m(t)/100 lb/gal× 5 gal/min = m(t)/20 lb/min

So, dm/dt = 2 lb/min - m(t)/20 lb/min

So, dm/dt = 2 - m(t)/20

dm/dt = [40 - m(t)]/20

separating the variables, we have

dm/[40 - m(t)] = dt/20

integrating, we have

∫dm/[40 - m(t)] = ∫dt/20

-1/-1 ×∫dm/[40 - m(t)] = ∫dt/20

1/-1 ×∫-dm/[40 - m(t)] = ∫dt/20

1/-1 ×㏑[40 - m(t)] = t/20 + C

-㏑[40 - m(t)] = t/20 + C

㏑[40 - m(t)] = -t/20 - C

taking exponents of both sides, we have

[tex]40 - m(t) = e^({\frac{-t}{20} - C}) \\40 - m(t) = e^{\frac{-t}{20}}e^{-C} \\40 - m(t) = Ae^{\frac{-t}{20}} (A = e^{-C})\\m(t) = 40 - Ae^{\frac{-t}{20}}[/tex]

when t = 0 m(0) = 10 lb

So

[tex]m(t) = 40 - Ae^{\frac{-t}{20}}\\m(0) = 40 - Ae^{\frac{-0}{20}}\\10 = 40 - Ae^{0}\\10 = 40 - A\\A = 40 - 10 \\A = 30[/tex]

So,

[tex]m(t) = 40 - 30e^{\frac{-t}{20}}[/tex]

when t = 40 minutes, m(40) =

[tex]m(40) = 40 - 30e^{\frac{-40}{20}}\\m(40) = 40 - 30e^{-2}\\m(40) = 40 - 30 X 0.1353\\m(40) = 40 - 4.06\\m(40) = 35.94[/tex]

So, at the end of 40 minutes, the amount of salt in the tank is 35.94 lb

answer:

30

step by step:

8+13+5+4=30

Answer:

96 divided by 8 = 12

Step-by-step explanation:

Answer:

[tex]x=60^o[/tex]

[tex]y=50^o[/tex]

Step-by-step explanation:

ΔACD

[tex]50+70+x=180[/tex]

[tex]120+x=180[/tex]

[tex]x=180-120[/tex]

[tex]x=60[/tex]

ΔABC

[tex]60+50+ACB=180[/tex]

110+ ∠ACB=180

∠ACB=180-110

= 70°

Now...

x+y+∠ACB=180°

[tex]60+y+70=180[/tex]

[tex]y+130=180[/tex]

[tex]y=180-130[/tex]

[tex]=50^o[/tex]

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hope it helps...

have a great day!!

Answer:

x = 60, y = 110

Step-by-step explanation:

the interior angles of a triangle will always add up to 180.

take the angles we already have and add them, once you get your answer you have to subtract that by 180 to find the missing angle.

70 + 50 = 120

180 - 120 = 60

———————-

the line at the bottom is called a straight angle, and it’s measure is 180

the exterior angle is equal to the sum of the two opposite interior angles (50 and 60)

y = a + b

y = 50 + 60

110 = 50 + 60

hope this helped!

Answer: what do you mean

Step-by-step explanation:

Answer: it equals m

C). m

Answer:

[tex]\frac{5x-7}{3}[/tex]

Step-by-step explanation:

Given

[tex]\frac{4x - 5}{2} - \frac{2x - 1}{6}[/tex]

Required

Express as a fraction

[tex]\frac{4x - 5}{2} - \frac{2x - 1}{6}[/tex]

Take LCM

[tex]\frac{3(4x - 5) - (2x - 1)}{6}[/tex]

Open bracket

[tex]\frac{12x - 15 - 2x + 1}{6}[/tex]

Collect like terms

[tex]\frac{12x - 2x- 15 + 1}{6}[/tex]

[tex]\frac{10x-14}{6}[/tex]

Simplify

[tex]\frac{5x-7}{3}[/tex]

Answer:

#4: 130/60, simplified is 13/6 (divide numerator and denominator by 10)

#5: 110/130, simplified is 11/13 (divide numerator and denominator by 10)

#6: 5/12

#7: 4/12, simplified is 1/3 (divide numerator and denominator by 4)

#8: 12/4, simplified is 3, or 3/1 (divide numerator and denominator by 4)

Step-by-step explanation:

#4: Part 1 is 60 miles, and the whole trip is 60 + 20 + 50 = 130 miles

So while #1 was 60 over 130 for "60 to 130", now we'll put the 130 on top of the 60 for "130 to 60" as a spoken ratio

#5: I think they mean add part 1 to part 3, then compare to the whole.

so 60 + 50 = 110, and your answer is 110/130

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Punch: 3 pints Hawaiian punch, 4 pints of orange juice, 5 pints of ginger ale is the recipe. When you pour that all together, you have 3 + 4 + 5 pints of mixed punch as a total, or 12 pints.

#6: 5 pints of ginger ale to 12 pints of punch: 5/12

#7: 4 pints of orange juice to 12 pints of punch: 4/12

#8 12 pints of the whole drink to 4 pints of orange juice: 12/4

9514 1404 393

Explanation:

Shrinkage is the loss of inventory from causes other than normal use or sales. It is the difference between the inventory on the books and the amount of inventory actually available for use. Typical causes of shrinkage are theft, damage, fraud, counting error, administrative error.

Answer:

c)A cylinder with a volume of  π(w³ +2w² )in³

 where w represents the width of the cylinder.

Step-by-step explanation:

A cylinder with a volume of  π(w³ +2w² )in³

 where w represents the width of the cylinder.

The  volume of a cylinder is given by  V=Bh or V=πr²h

where B is the area of the base and h is the height of the cylinder.

V=πr²h-------equation1

V= π(w³ +2w² )--------- equation2

Comparing equation 1 and equation 2

πr²h=π(w³ +2w² )

r²h=(w³ +2w² )

r²h= w²(w +2 )

Taking w² common leaves w+2 which gives the height or length of the cylinder.

Therefore radius = width and height = length which gives the volume of the cylinder.

Answer:

a.

False : it is to add 16+8

b.

False : its 8.

c.

True.

d.

False : its 24.

3.

side of cube [a]=2ft

volume of cube [V]=a³=2³=8ft³

He needs 1 bag to buy.As its volume is equal.

Answer:

[tex]\theta = 40.59^\circ[/tex]

Step-by-step explanation:

Given

The question is illustrated with the attached image

Required

Find [tex]\theta[/tex]

To do this, we use sine formula

i.e.

[tex]\sin(\theta) = \frac{Opposite}{Hypotenuse}[/tex]

So, we have:

[tex]\sin(\theta) = \frac{10.8}{16.6}[/tex]

[tex]\sin(\theta) = 0.6506[/tex]

Take arc sin

[tex]\theta = \sin^{-1}(0.6506)[/tex]

[tex]\theta = 40.59^\circ[/tex]

Answer:

Find the value of one the subtract it from 180

Step-by-step explanation:

Solve for X in interesting lines by finding the value of one adjacent angle and subtracting it from 180 degrees.

Answer:

1/5

Step-by-step explanation:

No matter how many times you spin, it will always remain random. (With a few exceptions)