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
Lelu [443]
3 years ago
5

Anyone help!!!! Please I grant brainliest.

Mathematics
2 answers:
lakkis [162]3 years ago
7 0

Answer:

hope this helps you.........

Masja [62]3 years ago
4 0

Length of arc = 11 cm

Answer:

Area of sector =115.5 square cm

Step-by-step explanation:

Length of arc =  \frac{30 \degree}{360 \degree}  \times 2 \times  \frac{22}{7}  \times 21 \\  \\  = \frac{1}{12}  \times 2 \times  22  \times 3 \\  \\  = \frac{1}{12}  \times 6 \times  22\\  \\  = \frac{1}{2}  \times  22\\  \\  = 11 \: cm \\  \\  \\  \\ area \: of \: sector =  \frac{ 30 \degree}{360 \degree}  \times \pi {r}^{2}  \\  \\  =  \frac{1}{12}  \times  \frac{22}{7}  \times  {21}^{2}  \\  \\  =  \frac{1}{12}  \times  \frac{22}{7}  \times 21 \times 21 \\  \\  = 115.5 \:  {cm}^{2}  \\

You might be interested in
Solve the system of equations by finding the reduced row-echelon form of the augmented matrix for the system of equations.
ycow [4]

This  involves quite a lot of arithmetic to do manually.

The first thing you do is to make the first number in  row 2  = to 0.

This is done by R2 = -3/2 R1 + R2

so the matrix becomes

( 2        1          1)    ( -3 )

( 0    -13/2   3/2)   (1/2 )

(5       -1           2)  (-2)

Next step is to make  the 5 in row 5  = 0  

then  the -1  must become zero

You aim  for the form

( 1 0 0) (x)

(0 1 0) (y)

(0 0 1) ( z)

x , y and z will be the required solutions.


4 0
3 years ago
Read 2 more answers
If H is obtuse, then HG ___ GJ.
Karolina [17]
That would be HG < GJ
7 0
3 years ago
Read 2 more answers
Please help! I will give brainly
Shkiper50 [21]
15x12=180
180$ simple unless u have a different way to do it
3 0
3 years ago
Read 2 more answers
What is the solution of -4(8-3x)&gt;or=6x-8?
Illusion [34]

Answer:

-4(8-3x)>or =6x-8

Step-by-step explanation:

open d bracket

-32+12x >or = 6x-8

collect like terms

12x-6x >or =-8+32

6x = 24

divide both sides by 6

x= 4

8 0
3 years ago
X+4y=-4, x+10y=-16, solve using systems of equations, elimination
lora16 [44]

Answer:

x = 4

y = -2

Step-by-step explanation:

x + 10y = -16

-x -4y = 4 <-- ( multiplied x+4y=-4 with -1 so the x's cancel)

6y = -12

y = -2

put -2 back in the equation to get x

x + 10y = -16

x -20 = -16

x = 4

6 0
2 years ago
Other questions:
  • Help please i’ll give u brianliest
    6·1 answer
  • What is the range of y= -5sin(x)
    15·1 answer
  • The cost per pound of chicken is $2. Each serving of chicken is about 4 oz. What will be the portion cost of the chicken?
    10·2 answers
  • If 3.485 ÷ 5.1 is written in long division form as so that the divisor is written as a whole number, where should the decimal po
    15·1 answer
  • Mr Nersin likes to ride his bike. He rode for 1/2 hour. After a short rest, he rode 1/10 hour more. He traveled 4 miles in all.
    14·2 answers
  • Whats 2+2? geng geng geng geng geng
    5·2 answers
  • 2. About 40 millions of aluminum cans can be recycled each month in the US. A quarter of these aluminum cans are used to make on
    11·1 answer
  • A flag pole casts a shadow that is 10 feet long. A nearby windmill casts a shadow that is 18 feet long. If the flag pole is 18 f
    5·2 answers
  • 17) Find the slope of the line that passes through each pair of points.
    9·1 answer
  • Please answer I’ll give brainly please help I’m begging you
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!