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
Phoenix [80]
3 years ago
12

Please answer #s 7,11,12, and 13 thanks please really quick

Mathematics
1 answer:
soldier1979 [14.2K]3 years ago
5 0

7) Area trapezoid = (B+b).H/2, but the Median is equal to (B+b)./ 2

84 =12 . H ==> H = 84/12 ==> H = 7


11) Area Equilateral triangle inscribe in a cercle with Radius R = 2√3

Area = (B.. Altitude) / 2. Calculate H, the altitude. The altitude in an equilateral triangle bisects the opposite side. Apply Pythagoras
(2√3)² = (√3)² + H² ==> 12 = 3 + H² ==> H² = 9 & H = 3
Hence Are = (2√3 x 3) /2 ==> 3√3 unit² or 5.2 unit²

12) Area of regular hexagone with perimeter =12

regular hexagone  is formed with 6 equilateral triangles with
each side =12/6 = 2 units
Let's calculate the area of 1 equilateral triangle. Follow the same logic as in problem 11 & you will find that Altitude = √3, Area =(2.√3)/2 =√3 =1.73 Unit³

13) a) Circumference of a circle : 2πR==> 2π(30) =60π = 188.4
b) Area of a circle =πR³ ==> π(30)² = 900π = 2,826 unit² 


You might be interested in
A zoo has 40 emperor penguins . if 30% of them are male , how many are male
drek231 [11]

Answer:

12 of them are male.

Step-by-step explanation:

3 0
3 years ago
The table of values represents a polynomial function f(x).
AVprozaik [17]

Answer:

  1500

Step-by-step explanation:

The average rate of change of a function on the interval [a, b] is given by ...

  rate of change = (f(b) -f(a))/(b -a)

On the interval [7, 9], the average rate of change is ...

  (5760 -1920)/(9 -7) = 3840/2 = 1920

On the interval [4, 6], the average rate of change is ...

  (945 -105)/(6 -4) = 840/2 = 420

The rate of change on the first interval is greater by ...

  1920 -420 = 1500

7 0
3 years ago
A person died leaving behind inheritance of Rs. 300000. Distribute the amount among 4 sons and 3 daughters so that each son gets
yan [13]
S=2d

4s+3d=300000-80000

4s+3d=220000, now using s=2d in this equation you get:

4(2d)+3d=220000

8d+3d=220000

11d=220000

d=20000

So each daughter gets 20000 and each son gets 40000.
3 0
3 years ago
Plot each of the three elevations as a point on a vertical number line. Label each point with its numerical value
Whitepunk [10]

What is Elevation ?

When the height of a point is its vertical distance above or below the surface of a reference plane you have selected, it is called the elevation of that point. When the height of a point is its vertical distance above or below mean sea level , it is called the altitude of the point.

Elevation is defined as the height above the ground or other surface, or a place or position of height. An example of elevation is a plane flying at 36,000 feet above the ground. An example of elevation is a pope being raised to the position of saint.

To learn more about Elevation

visit : brainly.com/question/15438337

#SPJ9

7 0
1 year ago
What is 50 divided by 8675 showing your work
Ierofanga [76]
8675 ÷ .5= 17350
You could also multiply by 2 to check your answer 
17350 * .5= 8675
You could also divide by 2.
5 0
3 years ago
Other questions:
  • Four friends own a car wash. The total profit in the first month was $438. I two months, each if the friends had made a profit o
    7·1 answer
  • Are cubic millimeters bigger than cubic inches
    15·2 answers
  • Joshua has $560. He wants to buy a laptop that costs $320 as well as a case for the laptop that costs $65 and is currently on sa
    6·1 answer
  • ben is 12 years older than ishaan.ben and ishaan first met two years ago. three years ago,ben was 4 times as
    10·1 answer
  • Name 2 strategies that you can use to find the area of a shape​
    10·2 answers
  • What does “B” equal in degrees?
    6·1 answer
  • B<br> 370<br> 11<br> х<br> с<br> С<br> A<br><br> find x
    11·1 answer
  • A house has increased in value by 35% since it was purchased. If the current value is $297,000, what was the value when it was p
    11·1 answer
  • Please provide an explanation. Thanks
    15·1 answer
  • Tell whether the table of values represents a linear or an exponential function ​
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!