1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Illusion [34]
3 years ago
7

HELPP PLEASE ASAP!

Mathematics
1 answer:
drek231 [11]3 years ago
4 0

Answer:

B) 12.25πm²  

Step-by-step explanation:

The formula for the <em>circumference</em> of a circle is

C = 2πr

The circumference of your circle is

C = 7πm

If we factor out a 2 from the 7, we get

C = (2 × 3.5)πm = 2π(3.5m)

Now, if we compare the two formulas, we see that

r = 3.5m

The formula for the <em>area</em> of a circle is

A = πr²

If r = 3.5m, then the area of your circle is

A = π(3.5m)² = 12.25πm²

You might be interested in
Please i need help no links or files give me honest answer thanks!
Digiron [165]

Answer:

D)

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
Anyone know the answer to this?
jeyben [28]
3x-5+19-x+2x
5x-x=14
4x=14
3 0
3 years ago
Read 2 more answers
A metalworker has a metal alloy that is 15​% copper and another alloy that is 60​% copper. How many kilograms of each alloy shou
coldgirl [10]

18 kg of 15% copper and 72 kg of 60% copper should be combined by the metalworker to create 90 kg of 51% copper alloy.

<u>Step-by-step explanation:</u>

Let x = kg of 15% copper alloy

Let y = kg of 60% copper alloy

Since we need to create 90 kg of alloy we know:

x + y = 90

51% of 90 kg = 45.9 kg of copper

So we're interested in creating 45.9 kg of copper

We need some amount of 15% copper and some amount of 60% copper to create 45.9 kg of copper:

0.15x + 0.60y = 45.9

but

x + y = 90

x= 90 - y

substituting that value in for x

0.15(90 - y) + 0.60y = 45.9

13.5 - 0.15y + 0.60y = 45.9

0.45y = 32.4

y = 72

Substituting this y value to solve for x gives:

x + y = 90

x= 90-72

x=18

Therefore, in order to create 90kg of 51% alloy, we'd need 18 kg of 15% copper and 72 kg of 60% copper.

6 0
3 years ago
Jill just got her pilot’s license and wants to rent a plane. The Platinum Plane Company charges $180 plus $92 per hour to rent a
Luden [163]

Answer:

5

Step-by-step explanation:

solve equation 180+92x= 250+78x

6 0
3 years ago
Which pair is a pair of vertical angles?
Mariulka [41]

Answer:

Angles that are directly across from each other

Step-by-step explanation:

Vertical angles are angles that are directly across from each other, forming an x. They always have the same degree

8 0
3 years ago
Other questions:
  • What is the value of x enter your answer you answer in the box
    6·1 answer
  • 2x+7x <br> what is the answer to this
    15·2 answers
  • Original: 379 New: 83
    9·1 answer
  • I need the steps on how to get the answer to 7 divied by 6.93
    13·1 answer
  • A person in the audience of a game show has a 12% chance of winning free movie tickets. What is the chance that a person in the
    7·1 answer
  • What is 1/3 of 1,181=
    14·1 answer
  • Which of the following statement about the point (5,3 and ( 5,-3) is true?
    11·2 answers
  • Which of the following equations is not a true statement?
    15·2 answers
  • Plssss answer… for math
    11·2 answers
  • Erika is working on solving the exponential equation 50x = 17; however, she is not quite sure where to start. using complete sen
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!