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
Olenka [21]
3 years ago
8

What is the formula for area of a circle? 100 points

Mathematics
2 answers:
wel3 years ago
6 0

Hello!

The formula for the area of a circle is:

A = \pi x r²

sergiy2304 [10]3 years ago
3 0

Area = π r^2  where r = radius of the circle.

You might be interested in
Alexa is planning to drive across the United States in
ivann1987 [24]

Answer:

a=112

b=6

c=280

Step-by-step explanation:

you just plug the number into the equation

28x=y

where x is the gallons

and y is the total miles

8 0
2 years ago
Read 2 more answers
Wrote and solve an equation to find the number.The difference of twice a number and 7 is 9​
andrew11 [14]

n - 7 = 9

Step-by-step explanation:

so basically just make up a random variable and place it for the "twice a number" then u sovle it as a 2 step equation

6 0
3 years ago
Which are the solutions of x2 = –7x – 8?
vovangra [49]

Answer:

The solutions are:

x_1=\frac{-7+\sqrt{17}}{2}     x_2=\frac{-7-\sqrt{17}}{2}

Step-by-step explanation:

We have the following quadratic equation

x^2 = -7x - 8

We can rewrite the equation as follows

x^2+7x + 8=0

Now we use the quadratic formula to solve the equation

For an equation of the form ax ^ 2 + bx + c = 0 the quadratic formula is:

x=\frac{-b\±\sqrt{b^2-4ac}}{2a}

In this case:

a=1,\ b=7,\ c=8

Then:

x=\frac{-7\±\sqrt{7^2-4(1)(8)}}{2(1)}

x=\frac{-7\±\sqrt{49-32}}{2}

x=\frac{-7\±\sqrt{17}}{2}

x_1=\frac{-7+\sqrt{17}}{2}

x_2=\frac{-7-\sqrt{17}}{2}

7 0
3 years ago
Read 2 more answers
The polynomial x^2+3x-1 is a factor of x^4+3x^3-2x^2-3x+1 true or false?
pashok25 [27]

Answer:

Yes, it is true that x^2+3x-1  is a factor of x^4+3x^3-2x^2-3x+1.

Step-by-step explanation:

Let us try to factorize x^4+3x^3-2x^2-3x+1

x^4+3x^3-2x^2-3x+1\\\Rightarrow x^4-2x^2+1-3x+3x^3

Let us try to make a whole square of the given terms:

\Rightarrow (x^2)^2-2\times x^2 \times 1+1^2+3x^3-3x\\\Rightarrow (x^2-1)^2+3x^3-3x\\

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

Formula used above:

a^{2} -2 \times a \times b +b^{2}  = (a-b)^2

In the above equation, we had a = x, b = 1.

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

Further solving the above equation, taking 3x common out of 3x^3-3x

\Rightarrow (x^2-1)^2+3x(x^2-1)\\

Taking (x^{2} -1) common out of the above term:

\Rightarrow (x^2-1)((x^2-1)+3x)\\\Rightarrow (x^2-1)(x^2+3x-1)

So, the two factors are (x^2-1)\ and\ (x^2+3x-1).

\therefore The statement that x^2+3x-1  is a factor of x^4+3x^3-2x^2-3x+1 is <em>True.</em>

7 0
3 years ago
Complete the explanation on the 2 errors Margaret made, and then give the correct answer.
klemol [59]

Answer:

For the first page 2nd line they did 88846 squared instead of cubed.

The correct answer is 935,087,000,000,000.

Step-by-step explanation:

8 0
2 years ago
Other questions:
  • You are given the following data about Group B. 28 students in Group B have taken Math 2A, 28 have taken Math 2B, and 25 have ta
    14·1 answer
  • Your teacher pulls you aside after class and tells you that during the year, you spent 65 minutes total out of class going to th
    7·1 answer
  • A dead tree was struck by lightening causing it to fall over at a point 10 ft up from its base. If the fallen treetop forms a 40
    12·1 answer
  • How many sides of equal length does this triangle appear to have?
    5·2 answers
  • What percent of 125 is 24
    14·2 answers
  • What is 9x-4x+-5x<br> ????????????????????????
    14·1 answer
  • Help please i’ve been in here for hours looking for answers
    6·1 answer
  • DO ALLLLLL FOR BRAIJN LIEST MOSTLY NEED LAST 2 DONE THANKS :D
    13·1 answer
  • 6) Which expressions are equivalent? Choose ALL that apply.
    14·1 answer
  • Lol, I have no idea what to do
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!