Mathematics Middle School

Jamal performed an experiment flipping a coin. He did 10 trials and then his arm got tired. He recorded his results in the table. Based on the experimental probability, Jamal predicted that the number of times the coin lands heads up will always be greater than the number of times it lands tails up. What is the error in his prediction?

A 3-column table with 2 rows. Column 1 is labeled Coin with entries heads, tails. Column 2 is labeled Observed frequency with entries 8, 2. Column 3 is labeled Experimental probability with entries 0.80, 0.20.
He should have performed fewer trials before comparing them to the theoretical probability.
He did not need to perform the experiment to compare theoretical and experimental probabilities.
He should have subtracted the theoretical probability from the experimental probability.
He did not perform enough trials to compare the theoretical and experimental probabilities.
100 points

Answers

Answer 1

Answer: He did not perform enough trials to compare the theoretical and experimental probabilities.

Step-by-step explanation:

He only gave two entries for the experimental probability.He would need  atleast four or three.

Hope this helped you!

Answer 2
He did not preform enough trials to compare the theoretical and experimental properties.
Answer 3

Answer: He did not perform enough trials to compare the theoretical and experimental probabilities.

Step-by-step explanation:

He only gave two entries for the experimental probability.He would need  atleast four or three.

Hope this helped you!

Answer 4
He did not preform enough trials to compare the theoretical and experimental properties.

Related Questions

Third-, fourth-, and​ fifth-grade students collected clothing items to be sent to 3 different clothing donation centers. The​ third-grade students collected 55​ items, and the​ fourth-grade students collected 45 items. Each clothing donation center was given 75 items. Write and solve an equation to find how many items the​ fifth-grade students collected

1.A The​ fifth-grade students collected _ An equation that can be used is 55 +45 = 75 X
2.B The​ fifth-grade students collected _ An equation that can be used is (55+45+X) ÷=75
3.C The​ fifth-grade students collected _ An equation that can be used is ​(55 +45) x 3 = 75 + X
4.D The​ fifth-grade students collected

enter your response here items. An equation that can be used is ​55 +45+X=75

Answers

Answer: B) The answer is 125

Step-by-step explanation:

when u solve the equation you will get 125.

Answer:

the answer is B

Step-by-step explanation:

Please help! :( Was sick for a week now dying.
The tree diagram below shows all of the possible outcomes for flipping three coins.

A tree diagram has outcomes (H, H, H), (H, H, T), (H, T, H), (H, T, T), (T, H, H), (T, H, T), (T, T, H), (T, T, T).

What is the probability of one of the coins landing on tails and two of them landing on heads?
1/4
3/8
1/2 This is not correct I know because I got it wrong onn edge.
3/4

Answers

Answer: 3/8 , im pretty sure,
Reason: Amount of them landing on one tails and two heads / Whole amount of the tree diagram , My explanation sucks sorry
3/8
There’s 8 possibilities and 3 of them have two H and one T (HHT, THH, and HTH)

HELP!!! LOOK AT IMAGE

Answers

Answer: 100%

Step-by-step explanation:

100% is the answer I’m pretty sure hopefully this helps

state the vertices, foci, and asymptotes of the hyperbola with the equation
20x^2-25y^2=100
PLEASE SHOW YOUR WORK SO I CAN UDERSTAND!!!

Answers

To find the vertices, foci, and asymptotes of the hyperbola with equation 20x^2 - 25y^2 = 100, we need to first write the equation in standard form:

(x^2)/(5) - (y^2)/(4) = 1

From this equation, we can see that the hyperbola has a horizontal transverse axis, since the x^2 term is positive and is divided by a smaller number than the y^2 term. Therefore, the center of the hyperbola is (0,0).

Using the standard form of the hyperbola, we can find the values of a and b:

a^2 = 5, so a = sqrt(5)
b^2 = 4, so b = 2

Now we can find the vertices, foci, and asymptotes:

Vertices:
The vertices are located at (±a,0), so the vertices are at (-sqrt(5),0) and (sqrt(5),0).

Foci:
The foci are located at (±c,0), where c = sqrt(a^2 + b^2). Plugging in our values of a and b, we get:

c = sqrt(5+4) = sqrt(9) = 3

So the foci are at (-3,0) and (3,0).

Asymptotes:
The equations of the asymptotes are y = ±(b/a)x, so the equations of the asymptotes are:

y = ±(2/sqrt(5))x

Therefore, the vertices are (-sqrt(5),0) and (sqrt(5),0), the foci are (-3,0) and (3,0), and the equations of the asymptotes are y = ±(2/sqrt(5))x.

G−11 = 27
Simplify your​ answer

WILL MARK BRAINLIST

Answers

Answer:

G=38

Step-by-step explanation:

27 +11 = 38

I hope this helps!

HELP ME PLEASE I DON'T UNDERSTAND !!!!!!!!!!!!!!!!!!!!!!

Answers

the answer is 3, 4, and 7
congruent means that the angles are equal size to each other so angle x is congruent to 3 and 4 and 7 are also congruent to x, im pretty sure

so the answer should be 3,4,7

Polygon JKLM is drawn with vertices J(−4, −4), K(−4, −6), L(−1, −6), M(−1, −4). Determine the image coordinates of K′ if the preimage is reflected across y = −7.

K′(−4, −4)
K′(−4, −5)
K′(−4, 6)
K′(−4, −8)

Answers

Answer: -4,6

Step-by-step explanation:

To reflect a point across a horizontal line, we keep the x-coordinate the same, but negate the y-coordinate of the point. In this case, the line of reflection is y = -7. Therefore, to find the image coordinate of K′, we negate the y-coordinate of K and add 3 (since -7 - (-6) = -1):

K′(-4, -6 - (-7) + 3) = K′(-4, 4)

So the correct answer is K′(-4, 4)

Answer my recent unanswered pre-algebra questions for brainliest!

Answers

Answer:

Only if you award me brainliest

Answer:

Ok I will answer your recent unanswered pre-algebra questions.

But one thing…. Marking my answer as the BRAINLIEST. Is a must!

ayo 30 pts
What is the distance between the two points shown below?



6 units
0 units
4 units
8 units

Answers

Answer:

The distance between these two points is 4 units.

Answer:

4 units

Step-by-step explanation:

There are only 4 units of distance since in the y-axis, the first point is found on 0 and the second point is found on 4.

8th grade math i mark as brainliest

Answers

Okay so since the die is 6 sided your chances of getting any number is 1/6. Taking this knowledge you would do the following

1/6*1/6
1/36
So you would have a 1/36 chance to roll a 4 then a 1
You have a 1/36 chance cause it’s a six sided die so you have a 1/6 chance starting off and then you have to get a 1 so you have to multiply it by another 1/6 chance to get 1/36

ASAP I WILL GIVE BRAINLIEST
A composite figure is shown.
Which of the following represents the total area of the figure?

10.663 in2
24.413 in2
28.448 in2
34.335 in2

Answers

14.49 is the area of the rectangle
5.1975 is the area of the small triangle
4.725 is the area of the larger triangle
Add them together,

24.4125 or simplified, 24.413
The answer is 24.413 in2 cause the triangle formula is 1/2 base time height and the rectangle formula is b times height

Solve and show each step

Answers

Answer:

4th option

Step-by-step explanation:

Because the fourth option is the only option where the y-intercept is 15, which refers to the base price, and also 10x shows that every hour adds 10 dollars to the 15 dollar base price, and as the question says, it is higher than the 7.5 dollars an hour in the table above.

If this helped, please consider picking this answer as the Brainliest Answer. Thank you!

An art teacher has 28 students in her first-period class and 24 students in her second-period class. If almost 30% of the students in these classes are boys, about how many boys are in her first two classes?


please helppppppppppppppppppppppppppppppp

Answers

Answer:

.30 × 52 = 15.6 = 16 boys in the two classes

16 boys are in the class

PLEASE HELP QUICK!!!
In which step does the first mistake appear
(23.8 / 2 + 12) + 14.5 / 2
step 1 (23.8 / 14) + 14.5 /
2 step 2 1.7 + 14.5 / 2
step 3 1.7 + 7.25
step 4 8.95

Answers

Answer:

The mistake appears in step 1 where 23.8 is divided by 14 instead of 2.

The correct first step should be: (23.8 / 2) + 12 + (14.5 / 2)

Hope this helps!

Answer:

A

Step-by-step explanation:

The error arises in the equation "(23.8 / 2 + 12)", where the division is incomplete. A slick fix is to rephrase it as "(23.8 / 2) + 12" to ensure accurate calculation, with the division taking precedence over addition, resulting in a cooler computation!

FIRST ANSWER=BRAINLIEST ANSWER :)))))

Answers

First you need to draw in a diagonal across the "floor" of the room connecting 2 vertices. You should draw the diagonal so that it's going in the same direction as the spider's thread; the diagonal is drawn in the wrong way if it intersects across the spider's thread.

Then you need to mark in the measures. The figures that are parallel to each other are congruent, so they have equal measures. For example, the rectangle that is parallel to the 6 by 8 one has the same measures as that one. Also, all of the walls of the room are rectangles. That means that the opposite sides of each rectangle have equal measures.

Because the diagonal divides the rectangle into 2 right triangles, you can then use the Pythagorean theorem to find the length of the diagonal that you drew in. (12 squared + 8 squared = length of the diagonal squared, and solving gives you the length of the diagonal as the square root of 208)

Finally, you can see that there is another right triangle formed with the diagonal that includes the spider's thread. With the length of the diagonal and the length of 6 ft, you can use the Pythagorean theorem to find the length of the spider's thread. (6 squared + the square root of 208 squared = length of the thread squared) The length of the spider's thread is the square root of 244, which is 15.6 ft rounded to the tenth's place.

Jackie plans to plans to paint the finger nails of 8 friends. She finishes painting 4 of her friends nails. If each friend has ten nails to paint, how many nailes does Jackie still need to paint? Write and solve an equation to show how many more nails Jackie needs to paint.

Answers

Answer:40

Step-by-step explanation:

each friend has 10 nails and there is a total of 8, 8 x 10 80 - 40 = 40 in other words Jackie has to paint 40 finger nails

Jackie has 8 friends, and each friend has 10 nails. So Jackie needs to paint a total of 8 x 10 = 80 nails.

If Jackie has already painted 4 friends' nails, she has painted 4 x 10 = 40 nails.

To find out how many more nails Jackie needs to paint, we can subtract the number of nails she has already painted from the total number of nails she needs to paint:

80 - 40 = 40

So Jackie still needs to paint 40 nails.

Please help me out. Ik its late but whoevers up rn please help me out this is needed by 12pm tomorrow. Thank You!!

Answers

Answer:

B 30°

Step-by-step explanation:

come now.

the sum of all angles around one point on one side of a line is 180°.

why ?

because any line with a point can be seen as a diameter of a circle with that point as center.

and every side of the line represents then a half-circle.

and a half-circle stands for 360/2 = 180°.

so,

180 = (2x + 70) + (x - 10) = 2x + 70 + x - 10 = 3x + 60

120 = 3x

x = 40

2x + 70 = 2×40 + 70 = 80 + 70 = 150°

x - 10 = 40 - 10 = 30°

180 = Q + (2x + 70) = Q + 150

30° = Q

Suppose you borrow money for a year at a simple interest rate of 7.2%. You pay $86.40 in interest. How much have you borrowed?

Answers

Answer:

  $1200

Step-by-step explanation:

You want to know the amount borrowed at 7.2% if the simple interest for one year is $86.40.

Interest

The interest formula is ...

  I = Prt

where P is the amount borrowed, r is the interest rate, and t is the number of years.

Application

Using the given values, we have ...

  86.40 = P·0.072·1

  P = 86.40/0.072 . . . . . . divide by the coefficient of P

  P = 1200

You have borrowed $1200.

Answer: 1200

Step-by-step explanation: Linear equation. 7.2x = 100(86.40). then divide by 7.2 on each side. x=1200

does anyone know how to find the length and the width with only the volume(250) and a height(8)?

Answers

Answer: lxWxh= v

Step-by-step explanation:

To find the length of a rectangular prism, there should be two missing sides. Since we don't have length or width, you find what times 8 times another number equals 250.

A standard car tire has a diameter of 18 inches. If you drive 2 miles to school, how many times does your car tire rotate during the drive? (1 mile = 5,280 ft)

Answers

Answer:

Step-by-step explanation:

1. Convert the 2 miles into ft. 2*5280=10560.

2. Convert the 18 inches to ft. 18/12=1.5ft

3. Divide. 10560/1.5=7040

Hopefully that was corect! :)

A car dealership has various combinations of vehicles in their car lot, all of which have an equally likely chance of being selected.

Use the list of options below to determine the probability of each vehicle being selected. The problem is based on independent events.

Answers

Answer:

Step-by-step explanation:

The probabilities of each of the following combination in question is 1/8, 1/6, 1/8, and 1/12 respectively.

The car dealership offers combinations of car parameters. The possible values of each car parameter are :

Vehicle = [Sedan, Suv, Truck]

Exterior color = [Red, Blue, Silver, Black]

Interior Material = [Leather, Cloth]

1. The probability of selecting a Silver Vehicle with a Cloth Interior is 1/8.

P(Silver, Cloth) = P(Exterior = Silver, Interior=Cloth)

                       = P(Exterior = Silver) * P(Interior=Cloth)

                       = (1/Total exterior options) * (1/Total interior options)

                       

                       

2. The probability of selecting an SUV or Truck with a Red or Black color and Cloth Interior is 1/6.

P(SUV|Truck, Red|Black, Cloth)

                       = P(Vehicle=Suv|Truck, Exterior = Red|Black, Interior=Cloth)

                       =  P(Vehicle=Suv|Truck) * P(Exterior = Red|Black) * P(Interior=Cloth)

                       = (2/Total vehicle options) * (2/Total exterior options) * (1/Total interior options)

                       

                       

                       

3. The probability of selecting a Sedan of a non-Red color and Cloth Interior is 1/8.

P(Sedan, !Red, Cloth)

                       = P(Vehicle=Sedan, Exterior != Red, Interior=Cloth)

                       =  P(Vehicle=Sedan) * (1- P(Exterior = Red)) * P(Interior=Cloth)

                       

                       

                       

4. The probability of selecting a Truck of a Blue or Black color and Leather Interior is 1/12.

P(Truck, Blue|Black, Leather)

                       = P(Vehicle=Truck, ExteriorBlue|Black, Interior=Leather)

                       =  P(Vehicle=Truck) * P(Exterior = Blue|Black)) * P(Interior=Leather)

                       

                      

ANSWER QUICK PLS
look at the trapezium below, work out the size of angle
angle tuv
angle vwt
give your answer in degrees

Answers

Answer:

Step-by-step explanation:

The value of angle ADC is 157.4°

How do you find angle In a trapezium?

The sum of angles in a trapezoid-like other quadrilateral is 360°. So in a trapezoid ABCD, ∠A+∠B+∠C+∠D = 360°. Two angles on the same side are supplementary, that is the sum of the angles of two adjacent sides is equal to 180°. The length of the mid-segment is equal to 1/2 the sum of the bases.

Therefore angle A + angle D = 180

using trigonometry,

cos A = 12/13

A = cos^-1(0.923)

A = 22.63°

therefore angle D = 180-22.63

= 157.4° ( 1 dp)

learn more about angle in a trapezium from

brainly.com/question/30179943

Answer:

see below

Step-by-step explanation:

TUV = 180-107 = 73

VWT = 180-58 = 22

pls help quick 50 points
32x+5x

Answers

Answer: 37x

Step-by-step explanation:

because both terms have an x after them, they are "like terms", so you can add the coefficients (numbers in front of x)

32+5=37

so your answer is 37x because you keep the term

ex. 5x+6y are different terms so you can't add them, 5 is in terms of x and 6 is in terms of y.

It's like say i have 5 times a certain numbers of apples

and 6 times a certain number of oranges

and they want to know how many apples you have

you can't say 30 times that number of apples.  It just is 5 times that number of apples.  you can't combine

please help i would really appreciate it

Answers

a^2+b^2=c^2. In this case, b=28 and c=35. Plug into equation. a^2+28^2=35^2. Simplify and you get a^2+784=1225. Get a^2 by itself so subtract 784 on both sides to get a^2=441. Then, to get a you do the square root of 441 which is 21. So the answer is 21.

Answer:

The length of the missing side is 21 cm.

Step-by-step explanation:

[tex]a^{2}[/tex] + [tex]b^{2}[/tex] = [tex]c^{2}[/tex]

[tex]a^{2}[/tex] + [tex]28^{2}[/tex] = [tex]35^{2}[/tex]

[tex]a^{2}[/tex] + 784 = 1225

[tex]a^{2}[/tex] + 784 - 784 = 1225 - 784

[tex]a^{2}[/tex] = 441

[tex]\sqrt{a^{2} }[/tex] = [tex]\sqrt{441}[/tex]

a = 21

Helping in the name of Jesus.

Evelyn deposited $23,750 in a savings account that earns 5.3% simple interest. Evelyn has not made any deposits or withdrawals since she opened the account. Approximately how many years have passed since Evelyn opened the account if her latest balance is $28,785?

Answers

3375000 is the solution of your problem
3375000 is the solution of your problem

A restaurant sells steaks for​ $23 per steak. How much money does the restaurant make if they sell 420​ steaks.

Answers

$9660
$23x 420 Steaks is $9660

Answer:

$9,660

Step-by-step explanation:

$23 x $420 = $9,660

4) If a person runs 2 3/4 miles in 1/2 hour, compute the unit rate as a complex fraction, ____ miles per hour which is equivalent to ____ miles per hour.​

Answers

Answer:5 1/2 for the first box and second I think

Step-by-step explanation:

pt.2 Can somebody do this, please?!

Answers

Answer:

7 ft

Step-by-step explanation:

15 ft - 8 ft = 7 ft

See my explanation on your other post asking a similar question to this one!

Answer:

9ft

Step-by-step explanation:

14 of the longest length

subtracted by 5 becuase they are parallel of each other including the missing one.

14-5=9

If Jason ran 1.8 miles and Josh ran
3,200 yards, who ran the farthest?
(1 mile = 5,280 feet)

Answers

Answer: Josh ran the farthest.

Step-by-step explanation:

1 mile = 5,280 feet

1.8 miles = 1.8 x 5,280 feet = 9,504 feet

1 yard = 3 feet

9,504 feet = 9,504 / 3 yards = 3,168 yards

So Jason ran 3,168 yards.

Since 3,200 yards is greater than 3,168 yards, Josh ran the farthest.

Answer:

Josh ran further

Step-by-step explanation:

I converted Josh's yards to miles.

[tex]\frac{3200yards}{1 }[/tex] · [tex]\frac{3 feet}{1 yard}[/tex] · [tex]\frac{1 mile}{5280feet}[/tex]  cancel out the words that you see on the top and on the bottom

[tex]\frac{3200}{1}[/tex] · [tex]\frac{3}{1}[/tex] [tex]\frac{1mile}{5280}[/tex]  Now simplify by multiplying

[tex]\frac{9600 miles}{5280}[/tex] = 1.8181... This is a repeating number

1.8181... is larger than 1.8

Helping in the name of Jesus.

Help please if u can explain why that would also help but u don’t have to

Answers

Answer:

D. It's like multiplying a fraction by -1: it multiplies only the numerator

The answer is B!

It’s B because multiplying any number by one equals the other number so therefore, 6 x -1 (meaning the negative sign before the parentheses) equals -6 and -7 x -1 equals 7 because a negative plus a negative equals a positive.

Integer rules are key here!!

Hope this helped.
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Consider the following probability distribution: 1 2 3 4 5 f(x) 0.1 0.40 0.15 0.25 0.10 Find Var(X) (write it up to second decimal place) Var(X) In a fixed exchange rate system, the central bank of a country will intervene in the foreign exchange market to try to maintain the value of its currency if it depreciates too rapidly against an important reference currency. False investigate and discuss the role that international banks and auditors might have played in parmalats collapse. 43. (a) Suppose you are given the following (x, y) data pairs.x235y436Find the least-squares equation for these data (rounded to three digits after the decimal). = + x(b) Now suppose you are given these (x, y) data pairs.x436y235Find the least-squares equation for these data (rounded to three digits after the decimal). = + x(d) Solve your answer from part (a) for x (rounded to three digits after the decimal).x = + y The figure below shows a rectangle prism. One base of the prism is shaded What is 7/10-1/2? Pls I really need this answer Specifications call for the true mean tensile strength of paper used in a certain packaging application to be greater than 50 psi. A new type of paper is being considered for this application. The tensile strength is measured for a simple random sample of 110 specimens of this paper. The mean strength was 51.2 psi and the standard deviation was 4.0 psi. At the 5% significance level, do we have enough evidence to conclude that the true mean tensile strength for the new type of paper meets the specifications?State the significance level for this hypothesis test. Enter your answer as a decimal, not a percentage.Compute the value of the test statistic. Round your final answer to four decimal places.Find the p-value. Round your final answer to four decimal places. you are performing 4 independent bernoulli trials with p = 0.1 and q = 0.9. calculate the probability of the stated outcome. for the standard normal probability distribution, the area to the left of the mean is _____.a. 1b. 0.5c. 0.5d. any value between 0 and 1 why do fmri and eeg still coexist as useful brain scanning techniques? Some researchers claim that married people are healthier than their unmarried counterparts because healthy people are attracted to other healthy people and are more desirable marriage partners. this phenomenon is referred to as the _______ effect explain briefly why the relative affinity of heme for oxygen and carbon monoxide is changed by the presence of the myoglobin protein. Because of the ease of entry into the market of monopoly, profits are competed away by the new firms. True or False a carpet which is 6 meters long is completely rolled up. When x meters have been unrolled, the force required to unroll it further isF(x)=700/(x+3)^2 Newtons.How much work is done unrolling the entire carpet? Your answer must include the correct units.Work = Going to mark as brainliest A project's critical path is ADEF. The project activity information are as follows. What is the project's variance? Activity Mean Variance 2 3 1 4 1 5 2 3 4 2 2 A. 10 B. 11 C. 14 D. 19 pls help me )))))))))))))))) how do artifacts affect interaction between members of the team? raul, a u.s. citizen lives in costa rica. raul's household includes a friend mariana who is age 19 and a citizen of costa rica. raul provides all of marianas support. in a thoughtful and organized manner discuss how did the changes brought by the industrial revolution affect people and society in an era of continued rapid population growth?