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
Dafna1 [17]
3 years ago
10

The sum of the areas of two circles is 8pie square meters. Find the length of a radius of each circle ifone of them is twice as

long as the other.what is the radius of the larger circle?

Mathematics
1 answer:
NeX [460]3 years ago
5 0
Nice

area=pir^2
the areas are
pir^2+pi(2r)^2
they add to 8pi

8pi=pir^2+pi(2r)^2
undistribute pi
8pi=pi(r^2+(2r)^2)
divide both sides by pi
8=r^2+(2r)^2
expand
8=r^2+4r^2
add
8=5r^2
divide by 5
8/5=r^2
sqrt both sides
√(8/5)=r
double since it is double
2√(8/5) is radius of bigger aka (4√10)/5

radius=(4√10)/5
You might be interested in
Select the correct answer.
ICE Princess25 [194]
The correct ois D. -17.5 degrees
Step-by-step explanation:
The daytime temperature in Apple Valley is
falling by 2.5 degrees each day
Therefore, Change in the temperature each day
=-2.5 degrees
Now, we need to find the net change in the daily
temperature after one calendar week
Now, number of days in one calendar week = 7
So, Net change in the daily temperature after
one calendar week = Daily change × Number of
days in one calendar week
Net change in the daily temperature after
one calendar week =-2.5 x7
# Net change in the daily temperature after
one calendar week =-17.5 degrees
Therefore, The correct option is -17.5
degrees
7 0
2 years ago
What is the value of x? two angles<br> 8x-8, 7x+8
My name is Ann [436]
15x due to -8+8 being 0
3 0
3 years ago
Read 2 more answers
What is the next term in the sequence below?<br> -324,108,-36,12
STALIN [3.7K]

Answer:

-4

Step-by-step explanation:

bc it is

.......................

4 0
3 years ago
Use your plan of dividing both sides by five to solve the equation. What is the value of x?
sleet_krkn [62]
Where’s the equation
4 0
3 years ago
compute the mean and variance of the following discrete probability distribution. (round your answers to 2 decimal places.) x p(
a_sh-v [17]

The  determined value of mean µ is 1.3 and variance σ² is 0.81.

What is mean and variance?

  • A measurement of central dispersion is the mean and variance. The average of a group of numbers is known as the mean.
  • The variance is calculated as the square root of the variance.
  • We can determine how the data we are collecting for observation are dispersed and distributed by looking at central dispersion.

The table is attached as an image for reference.

Mean µ = ∑X P(X)

         µ = 1.3

Variance (σ² ) = ∑ X² P(X)- (µ)²

                       = 2.5-(1.3)²

                (σ² ) = 0.81

The  determined value of mean µ is 1.3 and variance σ² is 0.81.

Learn more about mean and variance here:

brainly.com/question/25639778

#SPJ4

6 0
1 year ago
Other questions:
  • Jenny runs a cake making business, she receives an order of 6 carrot cakes. How much mixed spice will she need for 6 cakes. The
    10·2 answers
  • How can ΔWXY be mapped to ΔMNQ?
    6·2 answers
  • I've experiencing for a while but this is Finding missing angles. Please help me!!​
    15·2 answers
  • According to the stem-and-leaf plot above, how many trees are less than 640
    5·1 answer
  • True or False: Tangent line approximation works at any point on any graph.
    7·1 answer
  • Apply the distributive property to factor out the greatest common factor.<br><br>70−40p
    6·2 answers
  • Which expressions are equivalent to 8(-10x+3.5y-7) Select two options
    11·1 answer
  • The slope of a line is -, and the y-intercept is 10/3. What is the equation of the line written in general form?
    7·1 answer
  • The sum of the square of a positive number and the square of 4 more than the number is 80
    10·1 answer
  • Y=26-2 use a function ruler
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!