Mathematics Middle School

The diameter of a circle is 20 cm.
Find the area of a semicircle.
Use a = 3.14

The Diameter Of A Circle Is 20 Cm.Find The Area Of A Semicircle.Use A = 3.14

Answers

Answer 1

Answer:

157.08cm²

Step-by-step explanation:

pls brainliest

Answer 2

Answer:

157 cm

Explanation:

First you need to find the radius so you divide 20 by 2 (20 ÷ 2). Which will give you, our radius of 10. You take that radius and square it so 10 x 10. You will get a product of 100. Then you multiple the 100 by pi (100 x 3.14) and you will get 314. Since it's a semicircle you need to cut this 314 in half (314 ÷ 2 = 157).

Related Questions

-4(x-1)=-3x+13-9-x

Pls do it STEP BY STEP!!

Answers

Infinite
That’s
What it
Says

Answer:

-4x-4=-4x+4

-4x+4x=4-4

0=0

Step-by-step explanation:

If 12 cookies cost $3, how much would I pay for 5 cookies? Set up a proportion and solve.
$1.00

B.
$1.25

C.
$1.50

D.
$1.75

Answers

Answer:

B) 1.25

Step-by-step explanation:

$3/12 cookies = $.25/cookie

.25 * 5 = 1.25

The answer is b. And the working is In the pic below...

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Answers

-3+8=5

2-6=-4

-3+-1=-4

HELP!!!!!!!!!!!!!! ASAP!

Answers

Answer:

∠ ABC = 87°

Step-by-step explanation:

∠ ABD and ∠ DBE are adjacent angles and are supplementary, sum to 180° , so

2x - 17 + x + 32 = 180 , that is

3x + 15 = 180 ( subtract 15 from both sides )

3x = 165 ( divide both sides by 3 )

x = 55

Then

∠ DBE = x + 32 = 55 + 32 = 87° , thus

∠ ABC = ∠ DBE ( vertical angles  )

∠ ABC = 87°

Find the area of a composite figure. 3.14 help please!!:)

Answers

Answer:

47 add them all up and it equals to 47

Step-by-step explanation:

Several years ago, the average serving size of beef at restaurants was 5 ounces. Due to changing restaurant trends, the average serving size is now 20% larger. What is the current average serving size?

Answers

Answer:

1%

Step-by-step explanation:

Answer:

6 ounces

Step-by-step explanation:

20% of 5

0.20 x 5 = 1

5 + 1 = 6

A survey in one middle school showed that 4 out of 9 students help cook meals at home. Predict how many out of the 720 students in the school help cook meals at home.

Answers

Answer:

yes b

Step-by-step explanation:

yes

Dylan built the following pattern:

Which table represents the relationship between the pattern number (Input) and the number of squares (Output)?
Input Output
1 2
2 8
3 16
Input Output
1 4
2 8
3 12
Input Output
1 1
2 4
3 9
Input Output
1 2
2 6
3 12

Answers

Answer:

1   2

2  6

3  12

Step-by-step explanation:

pattern number is input

tiles number is output.

pattern number 1 has two tiles (first coordinates are (1,2))

pattern number 2 has 6 tiles (second coordinates are (2,6))

pattern number 3 has 12 tiles (last coordinate is (3,12))

answer:

1  2

2 6

3 12

Sam is selling used books online. The first book the customer buys is $8.00, the second-third book are $7.00 each, the fourth and all other books, b, are $5.00. A buyer has $35 to spend, before tax and shipping. Write an inequality to show how many books this customer may buy before the applicable taxes and shipping charges.

Answers

8+7+7+5b is less than or equal to 35

What number must be distributed in the following equation?
-6(x+7)=-12
answer choices:-6,7,or-12

Answers

Answer:

-6

Step-by-step explanation: -6 is your answer because it’s outside of the parenthesis

-6 is the number being distributed

PLEASE HELP ILL DO ANYTHINGG

Answers

Answer:

x is 23

Step-by-step explanation:

cause it is an 180 angle so 180-93=87

87 -18 =69

3x=69

x=23

Answer:

x=23

Step-by-step explanation:

in order to find x

(3x+18)° + 93°=180°

⇒3x+18=180-93

⇒3x=180-93-18

x=69/3

x=23

and there we go X = 23

hope it helps :)

have a great day!!

i also need this sorryy

Answers

February 23- yes
June 23- no
July 21- no
September 4- no
November 26- yes

PWEZ HELP


THis is 3 qwestions worth 10 each plz answer corectly and u get branlyest

1 Describe the two factors in this expression

4(8 + 3x)

2 The surface area of a cone with radius r units and slant height s units is shown below:

Surface area = 3.14(rs + r2)

Part A: If r = 6 units and s = 4 units, write an expression that can be used to calculate the surface area of the cone. (4 points)

Part B: What is the surface area of the cone? Show your work. (6 points)

An expression is shown below:

4(m + 3 + 5m)

Part A: Write two expressions that are equivalent to the given expression. (3 points)

Part B: Show that one of your expressions in Part A is equivalent to the given expression using algebraic properties. Explain which properties you used. (4 points)

Part C: Show that your other expression from Part A is equivalent to the given expression by substituting a number for m. (3 points)

Answers

Answer:

32x+12

Step-by-step explanation:

m

What's the answer to this? please help :)

Answers

Answer:14+12+12=38.    So 38 is your answer.

Step-by-step explanation:

please help I will really appreciate it. It is about unit rate!

Answers

Answer: The first one of the 180 miles the answer is 40 miles per gallon

The one of the 10 1/3 one answers is 62 miles per hour

and the $8 the answer is 9.6 U.S. dollars per hour

I hope this helped

HELP PLEASE?
I really need it

Answers

The vertical height is h= 3 units

hi help it’s six grade maths HELPPPP?!

Answers

Answer:

B

Step-by-step explanation:

1. Work out the inequality

Add 3 to both sides to get n alone

15+3 = 18

18<n

2. Read the inequality

" n is greater than 18 "

3. Read each answer choice to see which matches up

B is the answer...B states "n is greater than 18"

Help PLZ Answer Questions Below

Answers

Answer:

First question: 2/3

Second question: -2

Step-by-step explanation:

2x - 3y = 6

Subtract 2x from both sides

-3y = -2x + 6

Multiply by -1

3y = 2x - 6

divide by 3

y = 2/3x -2

The equation basically asks for slope, so 2/3

x + 1/2y = 5

Subtract x

1/2y = -x + 5

multiply by 2

y = -2x + 10

it is -2

how many times would you expect to roll a number less than 3 if you roll the dice 50 times

Answers

There are 6 sides on the die and each have a equal chance of being landed on. The numbers less then 3 are 1 and 2 which are 1/3 of the numbers on the cube. 1/3 of 50 is 16 and 2/3 so around 17 times

What is the measure of ∠KMN?
A. 29 degrees
B. 66 degrees
C. 53 degrees
D. 89 degrees

Answers

Answer:

  ∠KMN = 66°

Step-by-step explanation:

In ΔKMN,

∠MKN + ∠KNM + ∠KMN = 180       {Angle sum property of triangle}

39 + 75 + ∠KMN = 180

       114 + ∠KMN = 180

               ∠KMN = 180 - 114

           ∠KMN = 66°

Answer:

B) 66

Step-by-step explanation:

75+39=114

180-114=66

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Answers

Answer:

the answer is 44.4

Step-by-step explanation:

area for parallelogram is A=bh

Your answer is 44.4 if you want make sure then use the formula A=Bh

THIS LOOKS IMPOSSIBLE

Answers

Answer:

Dang hes smart as heck bro it is 80 Sq cm He deserves brainliest

Step-by-step explanation:

Please answer i will give brainlest Please answer I will give brainlest

Answers

im pretty sure that it’s just c d and e that are true.

Answer:

The answer is C, D, and E

Two students determined the value of this equation as shown below.
2x – (3x + 5) + 2 = 5x – 14
[picture below]
Describe any errors made when solving the equation by Student A.
Describe any errors made when solving the equation by Student B.
Show a complete set of correct steps to determine the solution to the equation.

Answers

(you can do the first two parts with the help of the third part)

2x-(3x+5)+2=5-14

2x-3x-5+2=5-14 (distribute the negative sign)
-1x-3=-9 (simplify equation by adding/subtracting)
-1x-3=-9 (add 3 on both sides)
-1x=-6 (divide both sides by negative 1)
x=6

hope this helps! also you can download mathaway and photomath to help you with problems like these

(CORRECT ANSWER GETS BRAINLIEST!!! 20 POINTS!!!)
What is the quotient of the division below?

2599 divided by 9
288.7
288.ModifyingAbove 7 with bar
288.8
288.ModifyingAbove 8 with bar

Answers

Last answer. 288. Modifying above 8 with bar

Answer:

I think it is B.

Step-by-step explanation:

Tell me who is right when you get this, me? Or the other person?

please help me out! this is urgent please do it correctly heres 10 points and a brainleist if you answer it right

Answers

Answer: An independent variable is exactly what it sounds like. It is a variable that stands alone and isn't changed by the other variables you are trying to measure. For example, someone's age might be an independent variable.
An independent variable is a variable that is alone, without anything

A sequence of transformations was applied to an equilateral triangle in a coordinate plane.
The transformations used were rotations, reflections, and translations. Which statement about
the resulting figure is true?
A. It must be an equilateral triangle with the same side lengths as the original.
B. It must be an equilateral triangle, but the side lengths may differ from the original
triangle.
C. It may be a scalene triangle, and all the side lengths may differ from the original triangle.
D. It may be an obtuse triangle with at least one side the same length as the original triangle.

Answers

Answer:

A It must be an equilateral triangle with the same side lengths as the original triangle.

Chloe needs to swim a total of 9 miles this week. So far this week , she swam 5 5/8 miles. Use the equation 5 5/8 + m =9 to find out how many more miles Chloe needs to swim.

Answers

Alright, so all we have to do here is solve the equation!

5 5/8 + m = 9

m = 9 - 5 5/8

Now is the tricky part - doing the subtraction! Let's change 9 to 8 8/8 (which is still equal to 9).

m = 8 8/8 - 5 5/8

Then we can subtract fairly easily!

m = (8 - 5) + (8/8 - 5/8)

m = 3 3/8 miles

Hope this helps!! :)

Answer:

what the person before said (:

Step-by-step explanation:

who ever gets this first will get a brainlest

Answers

So this would be 23/100 or you can do 23%

answer real quick and correct for brainly and thanks on your profile and on the answer

Answers

It is 2lbs 1oz. 3x11=33 and then divide 33 by 16 to get 2 and 1/16.

Answer:

2 pounds 1 ounces

Step-by-step explanation:

if each candy bar is 3 ounces and we have 11 we would have 33 ounces of candy bars. 3x11=33. each pound has 16 ounces. 33-32=1. 2 pounds and 1 ounce.

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