Please help me on this question.

Answers

Answer 1

Answer:

(a) Triangles ABC and ABD are equilateral triangles, so have internal angles of 60°. The angle CBD is the sum of the measures of angles CBA and ABD, both of which are 60°.

angle CBD measures 120° = 2π/3 radians

(b) The area of the left shaded area is the area of circle A minus twice the area of circular segment CBD. The area of a circular segment that subtends an arc of α radians is

... A = (1/2)r²(α - sin(α))

Then the area of the left shaded area is

... (area of circle) - 2 × (area of segment)

... = π·r² - r²(2π/3 - sin(2π/3)) = r²(π/3 + sin(2π/3))

For a radius of 6 cm, the area of the left shaded area is

... (6 cm)²(π/3 + (√3)/2) ≈ 68.876 cm²

Then the area of both shaded areas is

... shaded area ≈ 2 × 68.876 cm² ≈ 137.752 cm²

_____

(If you erroneously use the 3-digit value 3.14 for π, then you will get the erroneous 4-digit number 137.7 cm² for the shaded area. The number of significant digits in your value of π should be at least the number of significant digits you want in your answer. For the correct 4-digit answer 137.8 cm², you should use at least a 4-digit value for π, such as 3.142.)

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HELP!!!! Please?! Solve the equation below, and check the solution. -6x+7=79 the solution set is? BRAINLIEST ANSWER

I have 96 apples my friend has 87 apples 96+87

Answers

You both have 183 apples together!

if you add 96 and 87, the answer is 183.

The face of a clock has a circumference of 63 in. What is the area of the face of the clock?

Answers

Answer:

The area of the clock $= 315.41\ inch^(2)$

Step-by-step explanation:

We have been given the face of the clock that is $63\ in$

So that is also the circumference of the clock.

Since the clock is circular in shape.

So $2\pi(r)=63\ inch$

From here we will calculate the value of radius $(r)$ of the clock that is circular in shape.

Then $2\pi(r)=63\ inch =(63)/(2\pi) = 10.02\ in$

Now to find the area of the clock we will put this value of (r) in the equation of area of the circle.

Now $\pi (r)^(2)=\pi(10.02)^(2)=315.41\ in^(2)$

So the area of the face of the clock = $315.41\ in^(2)$

Answer:

The answer is 316

Step-by-step explanation:

I did a test it is the right answer everyone els is wrong :/

Helppppppppp me please :(

Answers

Answer:

12.57cm

Step-by-step explanation:

circumference =2^r

=2×22/7×2

=12.57cm

Solve the system if equations by substitution

Y=3x-13
3x+2y=19

Answers

$\left \{ {{y=3x-13} \atop {3x+2y=19}} \right. \n\nSubstitution\n\n3x+2(3x-13)=19\n\n3x+6x-26=19\n\n9x-26=19\ \ \ |add\ 26\n\n9x=45\ \ \ | divide\ by\ 9\n\nx=5\ny=3x-13=3*5-13=15-13=2\n\n\nx=5\ny=2$

The solution to the system of equations is x = 5 and y = 2.

Given that:

The system of equations:

y = 3x - 13 (1)

3x + 2y = 19 (2)

Step 1: Solve equation (1) for Y:

y = 3x - 13

Step 2: Substitute y from equation (1) into equation (2):

3x + 2(3x - 13) = 19

Step 3: Simplify the equation and solve for x:

3x + 6x - 26 = 19

9x - 26 = 19

9x = 19 + 26

9x = 45

x = 45/9

x = 5

Step 4: Substitute x = 5 into equation (1) to find Y:

y = 3(5) - 13

y = 15 - 13

y = 2

So, the values of x and y are 5 and 2, respectively.

Learn more about Equation here:

brainly.com/question/29657992

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chris and lisa went shopping and spent a total of $25.50. lisa spent $13.50 more than what chris spent. How much did Lisa spend

Answers

$25.50-$12.00=$13.50

Lisa spent $13.50

Lisa spent 13.50 all together

There are 5 swimmers in a race. There will be a first-place, a second-place, and a third-place prize awarded. In how many different ways can the 3 prizes be awarded?

Answers

it can only be between 3 people not 5 so 3 ways

3 ways for the first 3 people

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