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
slava [35]
3 years ago
11

The area of a square is 81m^2. Find the length of each side.

Mathematics
1 answer:
yulyashka [42]3 years ago
5 0

Answer:

L = 9m

Step-by-step explanation:

A = LxL

= L^2

L^2 = 81

L =

\sqrt{81}

= 9

You might be interested in
If a procedure meets all of the conditions of a binomial distribution except the number of trials is not​ fixed, then the geomet
morpeh [17]

Answer:

The probability is 0.0428

Step-by-step explanation:

First, let's remember that the binomial distribution is given by the formula:

P(X=k) =\left[\begin{array}{ccc}n\\k\end{array}\right] p^{k}(1-p)^{n-k} where k is the number of successes in n trials and p is the probability of success.

However, the problem tells us that when there isn't a number of trials fixed, we can use the geometric distribution and the formula for getting the first success on the xth trial becomes:

P(X=x) = p(1-p)^{x-1}\\

The problem asks us to find the probability of the first success on the 4th trial (given that the first subject to be a universal blood donor will be the fourth person selected)

Using this formula with the parameters given, we have:

p = 0.05

x = 4

Substituting these parameters in the formula and solving it, we get:

P(X=4) = 0.05(1-0.05)^{4-1}\\P(X=4) = 0.05 (0.95)^{3}\\P(X=4) = 0.05(.8573)\\P(X=4) = 0.0428

Therefore, the probability that the first subject to be a universal blood donor is the fourth person selected is 0.0428 or 4.28%

7 0
3 years ago
1 point<br> What is the center and radius of a circle with equation (x-4)2 + (y - 2)2 = 4
abruzzese [7]

Step-by-step explanation:

Find the Center and Radius (x-4)^2+y^2=4

(

x

−

4

)

2

+

y

2

=

4

This is the form of a circle. Use this form to determine the center and radius of the circle.

(

x

−

h

)

2

+

(

y

−

k

)

2

=

r

2

Match the values in this circle to those of the standard form. The variable

r

represents the radius of the circle,

h

represents the x-offset from the origin, and

k

represents the y-offset from origin.

r

=

2

h

=

4

k

=

0

The center of the circle is found at

(

h

,

k

)

.

Center:

(

4

3 0
2 years ago
Please help with all. I’m not sure if I’m wrong, PLEASE HELP I WILL GIFT ALL MY POINTS AND BRAINIEST ANSWER
Salsk061 [2.6K]

Answer:

Yes, you are right. Great job!

Step-by-step explanation:

4 0
3 years ago
A group of friends went to the movies. Movie tickets cost $8.50 each. One of the group bought some food for $6.50. The group spe
Liula [17]

Answer:

Equation: 8.5t+6.5=57.5

Solution: t=6

Step-by-step explanation:

Let be "t" the number of movie tickets bought by the group of friends.

According to the information given in the exercise, the price of each movie ticket is: $8.50.

Then, you can represent the amount (in dollars) the group of friends spent in movie tickets, with this expression:

8.5t

You know that one person spent $6.50, then the expression that represents the total amount (in dollars) the group of friends spent in food and movie tickets, is:

8.5t+6.5

Since that total amount spent is given in the exercise, you can write the following equation to determine how many tickets were bought:

8.5t+6.5=57.5

Finally, you can solve for "t" in order to find the solution of the equation. This is:

8.5t=57.5-6.5\\\\t=\frac{51}{8.5}\\\\t=6

3 0
3 years ago
What is the value of x if 17-3(x+9)=50
Rom4ik [11]

Answer:

-31 1/3

Step-by-step explanation:

17-3(x+9)=50

-17           -17

-3(x+9)=67

divide by -3

x+9=-22 1/3

  -9  -9

x=-31 1/3

6 0
3 years ago
Read 2 more answers
Other questions:
  • A seamstress is making a decorative pillow and wants to sew lace around the trim. The pillow is in the shape of a triangle with
    8·1 answer
  • Help!! It’s 50 questions i need this 2 plzz
    9·2 answers
  • Two SUVs head toward each other from opposite ends of a freeway 460 kilometers long. If the speed of the first SUV is 49 kilomet
    9·1 answer
  • Which of the following sets contains the fewest numbers?
    7·1 answer
  • Mario bought a new video game for $68.99. how much did he have to pay, including 13% tax
    12·2 answers
  • Slope = 0, y -- int = 1<br> Write the slope-intercep form of the equation of the line
    13·1 answer
  • Lamar buys $75 worth of clothes. He pays $81, including sales tax. What is the tax rate?
    6·1 answer
  • <img src="https://tex.z-dn.net/?f=%5Cfrac%7B-12a%5E%7B3%7Db%20%7D%7B4ab%5E%7B9%7D%20%7D" id="TexFormula1" title="\frac{-12a^{3}b
    7·1 answer
  • Ghhhhhhjreffr76f7urfytfy6r
    5·1 answer
  • Help plzzz... circle geometry question.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!