Mathematics Middle School

What is the radius of a circle that has a circumference of 81 π square inches?
A. 9 inches
B. 18 inches
C. 40.5 inches
d. 81 inches

Answers

Answer 1

Answer:

r≈12.89

Step-by-step explanation:

Using the formula

C=2πr

Solving for r

r=C

2π=81

2·π≈12.89155

Answer 2
2 the reason why is because I need 5 points. Hope that helps!

Related Questions

hellllllllllllllllllllllllllllllllllllllllpppppppppppppppppppp

Answers

Answer:

A) 52

Step-by-step explanation:

Each answer, when you divide, all equal to 52

I think that its equal to 52 in a

Help I'll give brainiest.

A fabric store is having a 25% off sale, Luisa has a gift card for $10 off her total purchase. The function f(x) = 0.75x - 10 represents the final cost of an x-dollar item after the discount and gift card are applied. Complete the table to determine the missing original prices and final cost of items A, B, C. D.

A $20 $???

B $??? $14

C $60 $???

D $??? $59

Answers

Answer:

See missing answers bold

$20 original = $5 final paid           as $15 was s/p before -10 was added

$30 original = $14 final price        as $24 was s/p before -10 was added

$60 original = $35  final price    as $45 was s/p before -10 was added

$92 original  = $69 final price       as $59  was s/p before -10 was added  

Step-by-step explanation:

Ans in bold  

A) = f(x) = 20(0.75) -10 =  15 - 10  = $5                 = £5 final paid

B)= f(x)  30 (0.75) = 24 - 10 = 14                           = $30 original price

C)  = f(x) = 60(0.75) -10 = 45 -10 = $35               = $35 final price

D)     = f(x) = 92 (75) = 69 -10 = $59                    = $92 original price

They say that smoking can reduce your life expectancy by 20%. If the life expectancy for a non-smoker is 90 years old, what is the life expectancy for a smoker?

Answers

The Life Expectancy for a smoker Is 40 years.

The answer is more than likely 72.

4. The figure shows a rectangle with a width of 6k inches. The length of the rectangle is 4 inches shorter than the width.

a.) Find the length of the rectangle in terms of k.
b.) What is the perimeter of the rectangle in terms of k?
c.) If k = 6, find the perimeter of the rectangle.

Answers

Answer:

i don't know i just need the points.

Step-by-step explanation:

Answer:

4 answer c

Step-by-step explanation:

i am truthfull

ASAP
Elsa has scored 16, 29, and 21 points and her three games so far how many points does she need to score in her next game so that her average (mean) is 22 points per game.

Answers

Answer:

22

Step-by-step explanation:

her average is already 22 so she needs to score 22 points for it to stay the same

plsss help ASAP thxs

Answers

Answer:

A 37

Step-by-step explanation:

A.) 37 square feet
do the area of the triangle, then the area of the rectangle, then add the 2

Quadrilateral ACEG≅Quadrilateral PRMN.

Which statement is true?


AG¯¯¯¯¯≅MP¯¯¯¯¯¯

CE¯¯¯¯¯≅NP¯¯¯¯¯¯

AC¯¯¯¯¯≅MR¯¯¯¯¯¯

EG¯¯¯¯¯≅MN¯¯¯¯¯¯¯

Answers

Answer:eg-mr

Step-by-step explanation:

Answer:

EG≅MN :D

Step-by-step explanation:

I got it right on a K12 test!

I might just be the opposite of smart but this question made no sense to me.-

Answers

I believe it’s C because if you look at exactly where the boxes end they both almost exactly end at 10 numbers past the first one

Answer:

I got ya

Step-by-step explanation:

k so I know it is not C or D tho I think it is A

Hope this helps if so please brainliest

(-7, 15), (-15, 1) Find the slope
pls help with work

Answers

The answer is 7/4 I added my work there sorry if it’s kinda messy
The answer is 7/4 for your question!

does anyone know the correct one cuz i got it wrong

Answers

i’m pretty sure it’s D
The answer is D

Explanation:

WILL GIVE BRAINLIEST
A line passes through the points (5,21) and (8,24) Write a linear function rule in terms of x and y for this line.
The linear function rule is y=?

Answers

Step-by-step explanation:

have you tried to use a calculator

24- 21

8- 5

Solve using substitution. –6x − 5y = 19 y = 7 ( , )

Answers

Answer:

(-9,7)

Step-by-step explanation:

Happy to help ! :)

A cylinder has a volume of 72 cubic inches. What is the volume of a cone with the same height and radius as the cylinder? explain (I don't have a picture of a cylinder sorry) ​

Answers

Explanation:

Formula: Volume = Length × Width × Height

help i'm doing missing assignments and this is a lil tricky.

Answers

Answer: 25.12 ft

To find the circumference of a circle, multiply the diameter with π (pi)

Formula: 2πr (2 × radius) (π = 3.14)

In the problem...

-----------------------------------------------------------------------------------------------------------------

We can multiply 3.14 by 8 to get the circumference.

3.14 × 8 = 25.12

Hence, 25.12 is the answer, but we can do it another way.

Let me know if you have any questions.

~ Lily, from Brainly.

Note to asker: Hi there, make sure to write down these formulas!

Circumference: 2πr

Area: πr²

Radius: [tex]\frac{diameter}{2}[/tex]

Diameter: radius × 2

Have a good day!

Pilar made 6 quarts of orange marmalade to store in jars.
If she puts 14 quart of marmalade into each jar, how many jars will she need? Write an equation that represents the problem and solve.
a 4 × 4 = 16
b 6 + 4 = 10
c 1 × 6 = 6
d 6 ÷ (14) = 24

Answers

Answer:

D

6 divided by 1/4 = 24

Step-by-step explanation:

It’s D .........it needed it be long because it’s saying that it need to me 20 characters long sooo......

At a local print shop, 14 copies can be made for $4. At this rate, how much would it cost to make 63 copies?

Answers

it would cost 18$ ! hope this helps :)
18 , because you would count by 14 but when you get to 56 your gonna have to do halve then add 7 that equals 63 then your gonna have to could by 4’s 4,8,12,16 so then halve of 4 is 2 so 18

4. The figure shows a rectangle with a width of 6k inches. The length of the rectangle is 4 inches shorter than the width.
a.) Find the length of the rectangle in terms of k.
b.) What is the perimeter of the rectangle in terms of k?
c.) If k = 6, find the perimeter of the rectangle.

Answers

Answer:

C.

Step-by-step explanation:

sorry if its not correct but i hope it helps

Answer:

c is the correct answer

Step-by-step explanation:

The rectangular pyramid shown has a volume of 1,560 cubic inches. What is the height of the pyramid? Explain how you found your answer

Answers

Answer:

30

Step-by-step explanation:

The volume formula is length x width x height ÷ 3. Triple the volume of a pyramid and then divide that amount by the area of the base to calculate its height. For this example, the volume of the pyramid is 200 and the area of its base is 30.

Answer:

Step-by-ya mamastep explanation:

The midpoint between y and k is d. What is y?

Answers

Y is the left point

(xy + 1) ÷ 7 if x=5 and y=11


please help (︶^︶)

Answers

(5x11 +1) divided by 7
(55+1) divided by 7
56 divided by 7
=8

Answer: it should be 8.

Step-by-step explanation:

Step 1. Factor in the given variables.

(xy + 1) ÷ 7 becomes ((5)(11) + 1) ÷ 7

Step 2. Do the first part in parentheses

so (5) x (11) which is 55.

Step 3. Add together the full parentheses

so 55 + 1 which is 56

Final step, divide.

56 divided by 7 equals 8.

Brainly plz help only three questions and don't answer for point kinda rude

Answers

I’ve attached my work
Anything in blue is for 8 and yellow is 10
Hope it helps!

Arwa is playing 'Guess my number'. Arwa says: 'If I add 0.4 to my number, divide the answer by 8, then multiply that answer by 9, I get 0.9.' What is Arwa's number?

Answers

0.4 is the answer because you if you work backwards and use inverse operations you get 0.4.
meaning, if you divide 0.9 by 9, you get 0.1. when you multiply 0.1 and 8 you get 0.8. and when you subtract 0.4 from 0.8 you get your answer, 0.4.

7th grade math pls help

Answers

22 x 13 is 286 and 11 x r is 11r leaving you with 286=11r and then you have to divide each side by 11 and you get r = 26

Answer:

R = 26

Step-by-step explanation:

If 22/11 is equal to 2, and r/13, that means that r/13 is equal to 2. What over 13 is equal to 2? 26

what are the factors of this expression, 5(4x + 2) ÷ 7y

crown for who gets it correct

Answers

Answer:

10(2x+1) / 7y

the / represents that this is put as a fraction

PLEASE help, i need this for assignment that due TODAY

Answers

Answer:

All

Step-by-step explanation:

-3x is the same as x times -3, so all the equation is true for all values of x.

the only answer it can really be is “all”

plz help i am so busy plz plz help me

Answers

D=60
DEC=50
CER=130

(X=30)
The first is 60 ! Good luck

Plz answer. What is the sum? 3x^2-2x-1/x-5 + -2x^2+x-5/x-5

Answers

Answer:

It is D, trust me because Doge said so.

Step-by-step explanation:

sat prep find y in equilateral triangle ABC.
a. 90 b. 70 c. 60 d. 40

Answers

Answer:

the ans

Step-by-step explanation:

40

The problem is about the percent of students who prefer certain kinds of music. The math information given is 40% like hip hop, 5% like Baby Shark, and 100 students prefer hip hop music. I wonder how many 6th grade students there are at the school?

Answers

Answer:

250

Step-by-step explanation:

if 40% of the students are in the 100 then that means each student is 2.5%.

im not exactly sure what the question was but i think this is the answer

A bus travels one and one half miles to a bus stop 4 times. How many miles in all has the bus traveled?
Question 1 options:

4 mi

5 mi

6 mi

7 mi

Answers

Answer:

6

Step-by-step explanation:

Calculator

Question 1 answer: 6 miles. Because if you take 1.5x4 it equals 6
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