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
mario62 [17]
3 years ago
13

Find the area of the circle. Round to the nearest square meter. 1, 257m ^ 2 314m ^ 2 897m ^ 2 63m ^ 2

Mathematics
1 answer:
Helga [31]3 years ago
3 0

Answer:

A=πr2

Step-by-step explanation:

You might be interested in
Is the sum even or odd? 6+7
valentina_108 [34]
Odd.................................

4 0
2 years ago
(8x- 1) (11X - 25) (15y - 48) ​
alexgriva [62]

1320xyX−4224xX−165yX−3000xy+528X+9600x+375y−12001320xyX-4224xX-165yX-3000xy+528X+9600x+375y-1200

5 0
3 years ago
Number 1 and 2 please (25 points)
Elenna [48]

Answers:

1) (3x+2)+(4-5x)=-2x+6

(3+2i)+(4-5i)=7-3i

2) (1-3x)(2+x)=-3x^{2}-5x+2

(1-3i)+(2+i)=5-5i

Step-by-step explanation:

In mathematics there are rules related to complex numbers, specifically in the case of addition and multiplication:

<u>Addition: </u>

If we have two complex numbers written in their binomial form, the sum of both will be a complex number whose real part is the sum of the real parts and whose imaginary part is the sum of the imaginary parts (similarly as the sum of two binomials).

For example,  the addition of these two binomials is:

(3x+2)+(4-5x)=3x-5x+2+4=-2x+6

Similarly, the addition of two complex numbers is:

(3+2i)+(4-5i)=3+4+2i-5i=7-3i Here the complex part is the number with the i

<u>Multiplication: </u>

If we have two complex numbers written in their binomial form, the multiplication of both will be the same as the multiplication (product) of two binomials, taking into account that i^{2}=-1.

For example,  the multiplication of these two binomials is:

(1-3x)(2+x)=2+x-6x-3x^{2}=-3x^{2}-5x+2

Similarly, the multiplication of two complex numbers is:

(1-3i)+(2+i)=2+i-6i-3i^{2}=2-5i-3(-1)=5-5i

8 0
3 years ago
Plz solve the 7th question immediately ....Help me......
Lynna [10]

Answer:

The value of x is 8cm. The length of 3 sides are 8cm, 15cm and 17cm.

Step-by-step explanation:

Using Pythagoras' Theorem, a²+b² = c² :

Let a be x cm,

Let b be x+7 cm,

Let c be 2x+1 cm

x² + (x+7)² = (2x+1)²

x² + x² + 14x + 49 = 4x² + 4x + 1

2x² + 14x + 49 = 4x² + 4x + 1

Then, move all the variables to one side and solve it to find the value of x :

4x² + 4x + 1 - 2x² - 14x - 49 = 0

2x² - 10x - 48 = 0

2(x² - 5x - 24) = 0

x² - 5x - 24 = 0

(x-8)(x+3) = 0

x - 8 = 0

x = 8 cm

x + 3 = 0

x = -3 cm (rejected)

Substitute the x value into the length of a,b and c :

a = x

= 8 cm

b = x + 7

= 8 + 7

= 15 cm

c = 2x + 1

= 2(8) + 1

= 16 + 1

= 17 cm

3 0
3 years ago
The waiting time at a doctor’s office is uniformly distributed with a minimum waiting time of 10 minutes and a maximum waiting t
MariettaO [177]

Answer:

25%

Step-by-step explanation:

There are 20 minutes between 10 and 30 and 5 minutes between 10 and 15 so you need to find 5% of 20 (5/20 x 100) which is 25%

6 0
2 years ago
Other questions:
  • HhhhhhhhhhhhhhhhhhhhhhheeeeeeeeeeeeeeeelpppPP!!!!!!!!<br><br> pls.
    14·1 answer
  • A cylinder has a volume of 400 cubic feet. If the height of the cylinder is 25 feet, what is the radius of the cylinder? Use 3.1
    11·1 answer
  • What is the solution to the equation below?
    14·1 answer
  • Simplify the expression. (rt)^12
    12·1 answer
  • A diner asks patrons for their preference for waffles or pancakes and syrup or fruit topping.
    7·2 answers
  • N +15=9<br> What’s the given variable
    7·2 answers
  • The equation of the graphed line is 2x – 3y = 12.
    13·1 answer
  • -3/4 plus -8/9
    13·1 answer
  • Smith and his friends are gaming online on a popular website. An hour later, 6 friends go offline. Five of them continue playing
    5·1 answer
  • 30 POINTS John opens a savings account and decides to deposit $10 each month. Let x represent the number of
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!