Mathematics Middle School

This i forgot and i need help fast can someone please help..
I will give brainliest

Answers

Answer 1

Answer:

1.) 471.24

2.) 1231.5

3.) 113.1

Step-by-step explanation: A = pi x r^2 + pi x r x ^2

1.) a = 3.14 x (5)^2 + 3.14 x 5 x ^2

a = 3.14 x 25 + 3.14 x 5 x 25

a = 78.54 + 392.70

a ≈ 471.24

2.) A = 3.14 (7)^2 + 3.14 x (7) x ^2

a = 3.14 x 49 + 3.14 x 7 x 49

a = 153.93 + 1077.57

a ≈ 1231.5

3.) a = 3.14 (3)^2 + 3.14 x 3 x ^2

a = 3.14 x 9 + 3.14 x 3 x 9

a = 28.27 + 84.82

a ≈ 113.1

Answer 2

Answer:

1= 60

2=252

3=21

Step-by-step explanation:

Related Questions

Look at this square. Find the value of a.

Answers

Perimeter is the total length of all sides. 72 divided by 4 equal sides of a square will give you the value of a. 72 divided by 4 is 18. The value of a is 18 yards.

Answer:

Step-by-step explanation:

A square has 4 sides of equal length.

The perimeter of the square is the sum of the lengths of the sides of the square.

P = perimeter; a = length of 1 side

P = a + a + a + a

P = 4a

We are told the perimeter is 72 yd.

4a = 72 yd

Divide both sides by 4.

a = 72/4 yd

a = 18 yd

Answer: 18

Gianna and her family went for a drive. They traveled 175 miles in 3 hours. What was their average speed?

Would you write an inequality or an equation?

Answers

To find the average speed, we divide the total distance traveled by the time taken:

Average speed = Total distance ÷ Time taken

Therefore, Gianna and her family's average speed is:

Average speed = 175 miles ÷ 3 hours = 58.33 miles per hour (rounded to two decimal places)

We use an equation to solve this problem.

Equation: Average speed = Total distance ÷ Time taken

Where:

Total distance = 175 miles

Time taken = 3 hours

Substituting these values into the equation, we get:

Average speed = 175 miles ÷ 3 hours

Therefore, the answer is an equation:

Average speed = 175 miles ÷ 3 hours

The answer would be 175 divided by 3.

If xx and y vary directly and y is 21 when x is 7, find y when x is 5

Answers

Answer:

y = 15

Step-by-step explanation:

We need to solve for k

y = x

21 = 7k Divide both sides by 7 to solve for k

3 = k

y = xk

y = 5(3)

y = 15

Answer: y = 15

Step-by-step explanation:

Identify the coefficients of the algebraic expression.

Answers

The coefficients are 2, -7 and -1

Answer:

Step-by-step explanation:

any number next to a variable is a coefficient.

The circumference of a circular park is approximately 18 feet. What is the approximate area inside the circular park?

Answers

Answer:

25.685 square feet.

Step-by-step explanation:

Circumference = 2 * π * radius

From this, we can derive the formula for the radius:

radius = Circumference / (2 * π)

Let's substitute the value of the circumference and calculate the approximate radius:

radius = 18 / (2 * π)

radius ≈ 18 / (2 * 3.14159)

radius ≈ 2.865 feet

Now that we have the approximate radius, we can calculate the area:

Area ≈ π * radius²

Area ≈ 3.14159 * (2.865)²

Area ≈ 3.14159 * 8.193225

Area ≈ 25.685 square feet

Therefore, the approximate area inside the circular park is approximately 25.685 square feet.

We know that the circumference of a circle is given by:

C = 2πr

where C is the circumference and r is the radius of the circle.

In this case, we are given that the circumference is approximately 18 feet, so we can set up the following equation:

18 = 2πr

Solving for r, we get:

r = 9/π ≈ 2.864 feet

Now we can use the formula for the area of a circle:

A = πr^2

Substituting the value we found for r, we get:

A = π(2.864 ft)^2 ≈ 25.85 ft^2

Therefore, the approximate area inside the circular park is approximately 25.85 square feet.

answer w/ explanation !!

solve for x

Answers

so you’re gonna do

5x + 2 = 48
-2 -2

5x = 46
and then divide 5 by both sides and you get x = 9.2 (IF YOU GET IT WRONG IM VERY SORRY BECAUSE IM ALSO LEARNING THIS)

The values in the table describe a data set.

Minimum 20
Mean 30
Mean Absolute Deviation 3.5
Median 35
Interquartile Range 10
Maximum 55

Which value can be used to describe how the values in the data set vary with a single number?
A. median
B. maximum
C. interquartile range
D. mean

Answers

The interquartile range (IQR) is the best choice here to describe the variability of the data set with a single number.

The IQR is 10, indicating the middle 50% of the data values lie within the range of 28 to 43 (35 +/- 10 is 28-43).

The other choices are:

Mean (30) - Describes the central tendency but not variability.
Median (35) - Also describes central tendency but IQR gives a better sense of spread.
Maximum (55) - Only describes the upper limit, not variability.

So the interquartile range (IQR) of 10 is the best choice to capture how spread out or varied the values in the data set are.

The answer is C. interquartile range

The value that can be used to describe how the values in the data set vary with a single number is the Mean Absolute Deviation (MAD), which is given as 3.5 in the table.

Answer:
D. Mean Absolute Deviation

Please Help
I need an answer ASAP

Answers

i believe the the answer is 27

I believe it’s right to

HELP HELP HELP HELP
I need math

DUE today

Answers

Answer:

1.<3592

2.<623

3. <942

4. <829

5.692

6.986

Step-by-step explanation:

URGENT!!!! PLEASE HELP!!!

Answers

Answer:

I think it's y^4

Step-by-step explanation:

your answer would be y^4

y^7-3
7-3=4

You have a pizza with diameter 12
2
3 in., and a square box that is 12.65 in. across. Write 12
2
3 as a decimal. Can you fit the pizza inside the box?
What is the decimal expansion for 12
2
3?
A.12.6
B.12.65
C.12.6
D.12.66
pls help me

Answers

Answer:

D is the right choice and no you cannot fit the pizza inside the box.

Step-by-step explanation:

D is the answer because to turn 2/3 into a decimal you would divide 2 by 3 and the answer you would get would be 0.66666666666...You would then add 12 to the answer and get 12.6666... Once you get this answer you would round it to the hundredths to get 12.67 but since that is not an option you could use D, 12.66 inches.

Answer:

I believe the answer is D.

Step-by-step explanation:

GOOGLE

A local computer store sold 82 laptops this past month. Since the store first opened, it has sold 76 times that number. How many laptops has the store sold since it opened?

a. 5,412
b. 6,232
c. 6,192
d. 5,952

Answers

It’s “B” because if you multiply 82 and 76 you’ll get 6,232

The store has sold 6,232 laptops since it opened.

Option B is the correct answer.

We have,

Step 1:

Identify the number of laptops sold last month.

The problem states that the store sold 82 laptops in the past month.

Step 2:

Determine the total number of times the store has sold laptops since it opened.

The problem says that the store has sold 76 times the number of laptops sold last month.

So, we need to multiply 82 by 76.

82 laptops * 76

= 6,232 laptops

Thus,

The store has sold 6,232 laptops since it opened which is option B.

Learn more about expressions here:

https://brainly.com/question/3118662

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Need help ASAP
Will give BRAINLIEST

Answers

Step-by-step explanation: Surface area of triangular prism = 2A + PH.

Lateral surface of a triangular prism = Length × (a + b + c)

i hope it helps u :-)

Answer:

225 and 243.4

Step-by-step explanation:

Area of triangle = bh/2

A = 4*4.6/2

A = 9.2 cm sq

A of 2 triangles = 9.2*2 = 18.4 cm sq

Now, Area of 1 rectangle = lb --> 15*5 = 75 cm sq

A of 3 rectangles = 75*3 = 225 cm sq

Now, LSA = 225 cm sq. (excluding the triangles)

TSA = A of tr. + A of rec. = 18.4 + 225 = 243.4 cm sq

Hope it helped. Pls mark me the BRAINLIEST! Don't fool pls

i need help with this plssssss

Answers

Answer:

25 miles

Step-by-step explanation:

2.5/10=x/10

25= x

25 milessssssssss.....

I need some help on this math question:

Answers

The answer is a. For explanation see work attached

the answer is y= x-12/3 ( “x-12/3 is -12 over 3)

(Rewriting Rational Numbers LC)

Compare negative three and five tenths repeating and negative ten thirds using symbols <, >, or =.

negative three and five tenths repeating is less than negative ten thirds
negative three and five tenths repeating is greater than negative ten thirds
negative ten thirds is equal to negative three and five tenths repeating
negative ten thirds is less than negative three and five tenths repeating

Answers

Answer:

the third answer

Step-by-step explanation:

The answer is C hope this helped everyone have a good day and ac it

True or false, the fractions ¾ and 6/8 are equivalent.

A. True

B. False

Answers

Answer: A. True

Step-by-step explanation:

A because 3/4 multiplied by 2 on both top and bottom are 6/8

Help me please :>>>>>>>

Answers

Answer:

C. Median

Step-by-step explanation:

If both sides are symmetrical, then there is no need to try and find the mean or anything because you already have the middle point and no outliers. If there were outliers it'd be different, unless the outliers were symmetrical with the rest of it, then the median would still be a good option.

Median!!! Is equal to the central given plot Ed points

Sarah wanted to buy a TV. She had $390 in her pocket. The TV she wanted was $415; however she had a 10% off coupon. The sales tax is 6%. Does she have enough money to purchase the TV?

Answers

Answer: Sarah does not have enough money to purchase the TV.

Explanation: The total price is $395.91.

Answer:

Step-by-step explanation:

10% of 415

= 1/10 of 415

= 1/10 * 415

= $41.5

415 - 41.5 = $ 373.5

6% of 415

= 6% * 415

= $24.9

∴ $373.5 + $24.9 = $398.4

∴ Sarah cannot buy the TV as she is $ 8.4 short.

how do i solve 28=2x

Answers

Divide both sides by 2
14 = x
Solution: x = 14

Nadia is a stockbroker. She earns 12% commission each week. Last week, she sold $5400 worth of stocks. How much did she make last week in commission?If she averages that same amount each week, how much did she make in commission in 2011

Answers

Answer:

31312

Step-by-step explanation:

The population of monkeys is decreasing at an annual rate of 3% per year.

What is the monthly rate of decrease? Round to the nearest hundredth of a percent.

Answers

Since there are 12 months in a year, you would divide 3%, which is 0.3 converted to decimal, by 12

0.3 divided by 12 = 0.025

To round that answer by the nearest hundredth, you would look at the last digit.

Since that digit is a five, your rounded answer would be 0.03

ANSWER: 0.03%

Answer: 0.25%

Step-by-step explanation:

There are 12 months in a year so you would divide 3%/12.

3% as a decimal is 0.03, so 3%/12 = 0.03/12

0.03/12 = 0.0025

To convert a decimal to a percent you can just multiply by 100.

So, 0.0025 x 100 = 0.25%. The percent does not need to be rounded to the nearest hundred because there are no digits past the hundredths place.

To check our answer, we can do 0.25% x 12 = 3%. The annual rate is 3% per year so this answer is correct.

Michael is making a card for his dad's birthday. He's shaded a triangular section on the card where he wants to write his dad a message. What is the area of the parts of the card that are not shaded?(sides are 12cm, 3,, 9 )

144
108
72
66

Answers

Answer:

Option c) 72 cm²

Step-by-step explanation:

In the figure attached we can see a rectangle ABCD with length 12 cm and width 9 cm.

A triangle PEF with height BE and base EF.

Since side AE = 3 cm, so side EB = EC = 9 - 3 = 6cm

and EF = AD = 12 cm

Now we will find the area of of the parts of the card that are not shaded.

Area of parts that are not shaded = Area of rectangle - area of shaded triangle

= (12×9) - 1/2 (BE)(EF)

= 108 - 1/2(6)(12) = 108 - (3)(12) = 72

Option c) 72 cm² is the area of non shaded part.

Please Help! Explain or will be deleted!
If the probability that Carson will win a basketball game is 4/9. If he plays 180 games, how many can you expect him to win?

Answers

180/9 is 20

20 times 4 is 80

There u go it’s 80

You use a proportion to answer this.
4/9 = x/180
So you multiply 180 times 4 and then divide by 4
Or you can scale the proportion and do 4 times 20 to find x

WORTH 10 POINTS !!!!!! PLEASE HELP I WILL REPORT IF YOU JUST TAKE THE POINTS AND NOT ANSWER THE QUESTION

Answers

Answer:

There is no question

Step-by-step explanation:

there is no question, you need to post a question to get an answer

Melissa drew this model to represent the fraction
23
10
Which expression has an equivalent value?
A
3
1+
10
%0 + 40
B
10 + 10 + 10 + 1 + 1
C 1+1+%+1+%
- 4+4+4+++%

$Melissa drew this model to represent the fraction2310Which expression has an equivalent value?A31+10%0$

Answers

Answer:

C. 1 + 1 + 1/3 + 1/3 +1/3

Step-by-step explanation:

23/10 simplified is 2 and 3/10.

CAN I GET HELP??? ®Jason had a prepaid movie card with a value of $45 every time he watches a movie 7.50 is deducted from the value of his card the amount of money remaining on his card why dollars is a function of the number of movies he watches X

a) write a verbal description of the function and then write an algebraic equation for the function.

b) Construct a table of x and y values for the function in A). Use values of x from 0-6.

Answers

Answer:

a) The function represents the amount of money remaining on Jason's prepaid movie card after watching x movies. Each time he watches a movie, $7.50 is deducted from the card's value of $45.The algebraic equation for the function is:

y = 45 - 7.50x where y is the amount of money remaining on the card and x is the number of movies watched.

b) Here is a table of x and y values for the function in (a) using values of x from 0 to 6:

Step-by-step explanation:

CAN I GET HELP??? Jason had a prepaid movie card with a value of $45 every time he watches a movie 7.50

Isabella went to the salon and was charged $72.60 for a cut and color. She added 20% to the cost as a tip. If there is an 8% sales tax added to the original cost of the service, how much did she pay in total?

Answers

multiply by .08 i think

The total cost of the service paid by Isabella is given by the equation

A = $ 92.93

What is an Equation?

Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.

It demonstrates the equality of the relationship between the expressions printed on the left and right sides.

Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.

Given data ,

Let the total amount paid by Isabella for the services be A

Now , the equation will be

The cost of the service = $ 72.60

The percentage Isabella added as a tip = 20 %

So , the cost after the tip = 72.60 + ( 20/100 ) x 72.60

On simplifying the equation , we get

The cost after the tip = 72.60 + 14.52

The cost after the tip = $ 87.12

Now , the sales tax percentage = 8 % on the cost of service

Substituting the values in the equation , we get

Sales tax cost of the service = ( 8/100 ) x 72.60

On simplifying the equation , we get

Sales tax cost of the service = $ 5.808

Now ,

The total cost of the service A = cost after the tip + Sales tax cost of the service

The total cost of the service A = 87.12 + 5.808

The total cost of the service A = $ 92.928

The total cost of the service A = $ 92.93

Therefore , the value of A is $ 92.93

Hence , The total cost of the service is $ 92.93

To learn more about equations click :

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Apply the substitutions and evaluate for 1-3 please gve the math too i will give brainly if you do
1. 7x - 4; x =9
2. 3d + ( 5-d ); d =4
3. 8 + 2g - g ÷ 2; g = 6

Answers

Answer:

1. 59
2. 13
3. 17

Step-by-step explanation:

for 1, substitute the x for 9 then multiply then subtract 4

7x-4

7(9)-4

63-4

for 2, substitute both of the d's for 4 hen multiply and subtract with the 4's

3d + (5-d)

3(4) + (5 - 4)

12 + 1

for 3, substitute g for 6 and then start off by dividing and multiplying

8 + 2g - g/2

8 + 2(6) - 6/2

8 + 12 -3

20-3

hope this helps in a way :)

HELP ME FAST!!!!
Tiles labeled with the letters X, Y, and Z are in a bag. Tiles labeled with the numbers 1 and 2 are in a box. Make a tree diagram to represent the sample space of the compound event of selecting one tile from each container.

Answers

Answer:

Here is a tree diagram representing the sample space of the compound event of selecting one tile from each container:

```

Bag

/ | \

X Y Z

/ \ / \ / \

1 2 1 2 1 2

```

The first level of the tree represents the selection from the bag, and the second level represents the selection from the box. There are three branches at the first level, one for each letter tile in the bag, and two branches at the second level, one for each number in the box. The sample space consists of all possible combinations of one tile from the bag and one tile from the box.

Other Questions

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This i forgot and i need help fast can someone please help.. I will give brainliest

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This i forgot and i need help fast can someone please help..
I will give brainliest