can someone help with me this pls

Can Someone Help With Me This Pls

Answers

Answer 1

Answer:

a) The class interval containing the median is the interval 2 ≤ h <  3

b) The mean number of hours the children spent on their tablets is 2.2 hours.

Step-by-step explanation:

a) The given parameters are;

The number of students that spent 0 ≤ h < 1 hour = 4

The number of students that spent 1 ≤ h < 2 hours = 8

The number of students that spent 2 ≤ h < 3 hours = 11

The number of students that spent 3 ≤ h < 4 hours = 7

The median is given by the location of the 15th child which is located in the interval given as follows;

We note that the total number of children is obtained by adding the  frequencies of the intervals together, as follows;

The number of children = 4 + 8 + 11 + 7 = 30

The frequency of the first interval = 4

The sum of the first + Second intervals = 4 + 8 = 12

The sum of the first + Second + Third intervals = 4 + 8 + 11 = 23

Therefore, the class interval containing the median is the interval 2 ≤ h <  3

b) We use the midpoint of each class interval to find the mean as follows;

The mean = ∑fh/∑h

∴ The mean = (4 × 0.5 + 8 × 1.5 + 11 × 2.5 + 7 × 3.5)/(4 + 8 + 11 + 7) = 2.2

The mean number of hours the children spent on their tablets = 2.2 hours.


Related Questions

Annabeth has $29.00 to spend at the sporting goods store. She buys a T-shirt that costs $15.32. She also wants to buy a soccer ball for $12.87, a baseball cap for $8.39, a set of shin guards for $14.98, or a water bottle for $5.93. Use the equation $15.32 + c = $29.00, where c is the item cost, to select the most expensive item she can buy. A. 00:00 soccer ball B. 00:00 baseball cap C. 00:00 shin guards D. 00:00 water bottle

Answers

Answer:

B. Baseball cap

Step-by-step explanation:

Given that:

Total money available with Annabeth = $29.00

Amount at which T-shirt was bought = $15.32

Things that Annabeth wants to buy:

Soccer ball for the price of $12.87 or

Baseball cap for the price of $8.39 or

Set of shin guards for the price of $14.98 or

Water bottle for the price of $5.93

The equation that can be used to find the cost of most expensive item with the remaining amount of money:

$15.32 + [tex]c[/tex] = $29.00

[tex]\Rightarrow c = 29 - 15.32\\\Rightarrow c= \$13.68[/tex]

Cost of items that can be bought in the decreasing order is:

Cost of pair of shin guards ( $14.98 ) > Cost of soccer ball ( $12.87 ) > Cost of baseball cap ($8.39) > Cost of water bottle ( $5.93 )

The most expensive item that can be bought is the Soccer ball at $12.87.

Answer is:

B. Soccer ball

Cost of shin guards is more than the amount of money remaining.

The relay race is just over one mile long, approximately yards. If Jack and 4 other people each run a leg of the relay, how many yards will each runner run? Justify your answer using an estimation strategy.

Answers

Answer: By dividing 1760 by the jack and his friends, you get 352 yards per person

Step-by-step explanation:

hope it helps please consider giving brainliest

Answer:

im answering so you can give other person brainliest

Step-by-step explanation:

Please answer the following attached image:

Answers

The correct answer is D.Please mark me as Brainliest!

Answer:

6i

Step-by-step explanation:

[tex]\sqrt{-36} = \sqrt{36} \sqrt{-1}[/tex]

[tex]\sqrt{36}[/tex] is 6 and symbol for [tex]\sqrt{-1}[/tex] is i for imaginary. So your answer will be 6i

What is the distance between -8 and 4?

Answers

Answer: 12

Step-by-step explanation:

-8 is 8 away from 0.

4 is 4 away from 0.

8+4 = 12

Hope this helps!

plz help me to solve this all answer.

Answers

Step-by-step explanation:

The formula of a circumference of a circle with radius r:

[tex]C=2\pi r[/tex]

Solve for r:

[tex]2\pi r=C[/tex]     subtitute  [tex]\pi\approx\dfrac{22}{7}[/tex]

[tex]2\cdot\dfrac{22}{7}r=C[/tex]

[tex]\dfrac{44}{7}r=C[/tex]       multiply both sides by 7

[tex]44r=7C[/tex]      divide both sides by 44

[tex]r=\dfrac{7C}{44}[/tex]

Substitute the values of the circumference from your question:

[tex]i.\ C=88cm\\\\r=\dfrac{7\cdot88}{44}=\dfrac{7\cdot2}{1}=12(cm)\\\\=================[/tex]

[tex]ii.\ C=1.4m\\\\r=\dfrac{7\cdot1.4}{44}=\dfrac{9.8}{44}=\dfrac{98}{440}=\dfrac{49}{220}(m)\\\\====================[/tex]

[tex]iii.\ C=16m\\\\r=\dfrac{7\cdot16}{44}=\dfrac{7\cdot4}{11}=\dfrac{28}{11}(m)\\\\=================[/tex]

[tex]iv.\ C=33ft\\\\r=\dfrac{7\cdot33}{44}=\dfrac{7\cdot3}{4}=\dfrac{21}{4}(ft)\\\\=================[/tex]

[tex]v.\ C=5m\\\\r=\dfrac{7\cdot5}{44}=\dfrac{35}{44}(m)\\\\===============[/tex]

[tex]vi.\ C=66m\\\\r=\dfrac{7\cdot66}{44}=\dfrac{7\cdot3}{2}=\dfrac{21}{2}(m)\\\\================[/tex]

One year, Joey Chestnut won a hot dog eating contest by eating 66 hot dogs
in 12 minutes. If he ate at a constant rate, fill in the blank in the ratio table
to determine how many hot dogs he can eat in 4 minutes.



HELP ME REALLY FAST PLSSSS IM BEGGINGG YOUUUUUU I NEED HELP RNNNN

Answers

He eats 22 Hot dogs every 4 minutes you can see how many he eats per minute which is 5.5 multiply by the minute (4) and it’s 22

Divide. Round to the nearest tenth.
8 divided by 6.403

Answers

Answer:

1.2

Step-by-step explanation:

(I am not a good explainer)

1.250 I think I feel like that could be it

plz help me what is y=4x+8

Answers

X=-2
Move variable to the left and than you divide both sides of equation by 4

I NEED HELP ASAP, PLZ SHOW THE WORK, ILL GIVE THE FIRST PERSON WITH A GOOD ANSWER BRAINLIEST!!

Part A: Explain why the x-coordinates of the points where the graphs of the equations y = 4x and y = 2x−1 intersect are the solutions of the equation 4x = 2x−1. (4 points)

Part B: Make tables to find the solution to 4x = 2x−1. Take the integer values of x between −4 and 4. (4 points)

Part C: How can you solve the equation 4x = 2x−1 graphically? (2 points)

(10 points)

Answers

Answer:

Part A: So the solution for 4 = 2x-1 is -2. Why they're intersecting is because x is -0.5 in both cases. 2/4, as we already know, is 0.5. Since, this -2/4, we can just make 0.5 negative, so -0.5. -0.5 times 4 = -2, so x is -0.5. For y = 2x-1, multiply -0.5 by 2, which would get you -1. Then after that subtract 1, for -2.

Part B:

Well, notice how none of the entries for y = 4x and y = 2x-1 match. That would mean the answer wouldn't be an integer. (Attachment is the table)

Part C:

First, graph both y = 4x and y = 2x-1. After that, find where the two equations' y-coordinates are the same (So, on a graph, where they intersect.). The y-coordinate in common is your answer.

Answer:

A: the intersection represents the answer because the place where it intersects is where the equations have the same x values.

B:  they intersect at the point (0,1)

C: plot the equations on an online graph and solve, Its almost impossible to draw an accurate continuing graph for an exponential equation. I recommend desmos.

Step-by-step explanation:

I have a graph for part B.

PLEASE HELP ASAP
Negative 4/4 + 160% + 1/5
ENTER THE ANSWER AS AN EXACT DECIMAL OR SIMPLIFIED FRACTION

Answers

Answer:

0.8 or 8/10

Step-by-step explanation:

Answer:

4/5 or 0.8

Step-by-step explanation:

so, -4/4 and 1/5 are both already fractions.

160% as a decimal would be 1.6. 1.6 as a fraction would be 8/5.

-4/4 is just -1

-1+1/5+8/5

so, -5/5 +1/5 +8/5

-5/5 plus 9/5

4/5

the answer would be 4/5 or 0.8

Solve the matrix equation for X. Simplify all elements.
[-5
-3] = X- [-8 -8]

Answers

Answer:

x= -24

Step-by-step explanation:

Hope it helps.

Ravi drives to his aunts house. His aunt lives 200 miles away. Ravi will stop and call his aunt when he is less then 50 miles from her house. He drives at a speed of 60 miles per hour. When should Ravi stop and call his aunt?

Answers

Answer:

Step-by-step explanation:

34241

The ratio of pens to pencils is 5 to 4. If there are 25 pencils, how many pens are there?

Answers

Answer: 20 pens

5x5=25

5x4=20

Gary's pay is $15 per hour. He receives a 6% pay raise.
What is Gary's new hourly pay rate?

PLEASE HELP!!! Any help will be greatly appreciated
!

Answers

Answer:

Gary's new pay rate is $15.90 per hour.

Step-by-step explanation:

15 + 6% = 15.9

Please help ASAP please

Answers

Answer:

A and C

Step-by-step explanation:

A and c is correct enjoy

1. If you increase a number by ten, the result is less than sixteen
2. A number w times two is less than it equal to negative eight

Answers

Answer:

1. 1, 2, 3, 4, or 5

2. as long as it is -4, -5, -6, -7, and so on

Step-by-step explanation:

19. The perimeter of the rectangle is 36 centimeters.
3
What is the length of the diagonal?
o
A. 108 centimeters
o B. V 144 centimeters
O C. 216 centimeters
D. 234 centimeters

Answers

Answer:

I think its b

Step-by-step explanation:

Paige earned $15.50 per hour. She received a 15% raise. How much more does Paige earn now per hour?

Answers

Answer:

232.5

Step-by-step explanation:

If you take 15.50 and multiply it by 15 you get 232.5 if its wrong my apologies

Answer: $2.33

Step-by-step explanation:

Your formula for percent is % times X = Y.

So you multiply 15% x 15.50 and you get 2.325 and you round it up and the 5 makes your 2 go to a 3 and you get $2.33

5-gallon bucket of paint for $67.45 or 1 gallon of paint for $13.99! What is the answer I need it for a homework assignment

Answers

i need help with a problem i posted on my page please help me out
The cheaper cost would be to buy a 5-gallon bucket rather than buying 5 1-gallon buckets because 13.99 • 5 = 69.95, which is greater than 67.45

quem poder me ajudar, eu agradeço, olhem a imagem a baixo

Answers

Answer:

counfsed so can u write it in english ?

Step-by-step explanation:

What are the x and y Intercepts for the equation / graph 2x + 5y = 10

Answers

Answer:

y-intercept: 2

x-intercept: 5

Step-by-step explanation:

2x + 5y = 10

Let x = 0

2(0) + 5y = 10

y = 2

y-intercept: 2

Let y = 0:

2x + 5(0) = 10

2x = 10

x = 5

x-intercept = 5

Answer the problem below please. Thank you.

Answers

Answer:

(0,1)

Step-by-step explanation:

x-intercept: (2,0)

Y-intercept: (0,1)

It's when x is zero and the form (x,y)

What are two numbers that multiply to the value on top and add to the value on bottom

Answers

is this correct?

a * b = -70

a + b = -9......a = -9 - b

b(-9 - b) = -70

-b^2 - 9b + 70 = 0

(-b + 5)(b + 14) = 0

-b + 5 = 0

5 = b

b + 14 = 0

b = -14

ur numbers are -14 and 5

-14 * 5 = -70

-14 + 5 = -9

What is the length (in cm) of a rectangle with width 14 cm and area 168² cm​

Answers

Answer:

12

Step-by-step explanation:

Area = length * width

length = area ÷ width

Brandy only has $23 in cash to spend on drinks, and the concession stand charges $3.75
for a drink. If x represents the number of drinks purchased, and y is the amount of money
spent on drinks, what is the range in this situation?

Answers

Answer:

{0, 3.75, 7.5, 11.25, 15, 18.75, 22.5}

Step-by-step explanation:

Since the values in this function cannot go on infinitely this is a discrete funciton.

Its basically asking how much he can spend on drinks with 23$ if they are each 3.75$, this means that he can buy at most 6 drinks. Imagine a disctrete graph with a point on every value he spends per drink, (0,0) (1 , 3.75) (2 , 7.5) etc.

As our bright fellow shadow188 has stated, y is the range or the output so you list the possible outputs for the range in bracets.

I hope you found this helpful, ik its a little late.

The required range will be $3.75 ≤ y ≤ $23 for the function.

Given that,
Brandy only has $23 in cash to spend on drinks, and the concession stand charges $3.75 for a drink.
x represents the number of drinks purchased, and y is the amount of money spent on drinks, what is the range in this situation is to be determined.

What are functions?

Functions are the relationship between sets of values. e g y=f(x), for every value of x there is its exists in a set of y. x is the independent variable while Y is the dependent variable.

Here,
Let the x be the cost of the drink and y be the total amount of money spent,
Since there are concession stand charges of $3.75 also.
So the minimum charge will be $3.75 whether bought the drink or not, and Brandy has $23 to spend on drinks so the maximum will be $23.
So, the range can be given as $3.75 ≤ y ≤ $23.

Thus, the required range will be $3.75 ≤ y ≤ $23 for the function.

Learn more about function here:

brainly.com/question/21145944

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Find the domain and range of the function

Answers

Answer:

domain: (-∞ , ∞)

range: (-∞, 2]

Step-by-step explanation:

the domain is the set of values of what the x value can be. This function is parabolic and upside down, it can have a range of x values from - infinity to positive infinity. The function is most likely y=-x^2 +2

range is the output (y values) the function can possibly have. the max is 2 and includes 2 so we use bracket for that. The smallest y value can reach towards negative infinity.

Please give thanks by clicking the heart button! :)

The answer is -2,2 or infinity

What is the y-intercept of the equation y = 2x + 5

Answers

y-intercept is at 5.

from y = mx+b

m is the slope

b is the y-intercept.

Y intercept is at 5. The slope is 2

Answer the problem below please.

Answers

Answer:

green was the imposter

Step-by-step explanation:

Answer:

(6,0)

Step-by-step explanation:

x is horizontal, along the bottom of the graph and the line goes through at the 6th line.

10 to the power of 4 as a decimal

Answers

Answer:

You treat it as 10^4 (the small number is the number of zeros. Therefore the answer is 10000. Or of you meant 10^-4. Its the same concept, just reversed. So the answer in this case is 0.0004.

Cheers! :)

10 to the power of 4 is equal to 10,000.

To calculate 10 to the power of 4 as a decimal, you need to raise the base number (10) to the exponent (4).

Here are the steps to compute it:

Step 1: Start with the base number, which is 10.

Step 2: Multiply the base number (10) by itself 4 times, since the exponent is 4. The calculation looks like this:

10 x 10 x 10 x 10 = 10,000

Step 3: The result of multiplying 10 by itself 4 times is 10,000.

So, 10 to the power of 4 (10⁴) is equal to 10,000.

Hence 10 to the power of 4 is equal to 10,000.

Learn more about exponent and powers click;

https://brainly.com/question/28515493

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A refrigerator usually sells for $1000, but is on sale for $850, find the
percent change. *

Answers

Answer:

-15%

Step-by-step explanation:

percentage change is calculated by

(new price - old price) / old price

(850 - 1000) / 1000

please give thanks by hitting heart button! :)

Answer:

15%

Step-by-step explanation:

1. Subtract the sale price from the normal price.

$1000 - $850 = $150.

2. Divide this amount by the original price.

$150/$1000 = 0.15

3. Multiply by 100 to get the %.

0.15 x 100 = 15%

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