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viva [34]
3 years ago
14

What is the area of the circle of the diameter is 12

Mathematics
2 answers:
EleoNora [17]3 years ago
7 0
The answer is 113.1.... proven its correct
olga55 [171]3 years ago
4 0

Answer: 113.1

Step-by-step explanation:

Diameter = 12

We must find the radius. To do so, we divide the diameter by 2.

Radius = 6

Formula for finding the area of a circle: πr²

π = 3.14159265359

3.14159265359 × 6²

6 × 6 = 36

3.14159265359 × 36 = 113.097335529

Rounded to the nearest tenth = 113.1

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Ahmet rents a piano for $35 per month. He earns $25 per hour giving piano lessons to students. He wants to know
Vinvika [58]

Answer:

25h-35=440

440+35=25h

475=25h

475÷25=h

h=19

19 hours

It will take 19 hours of lessons.

3 0
4 years ago
Use the formula to solve the problems.
slega [8]
A = p(1 + r)^t
A = 6000(1 + .07)^8
A = 6000(1.07)^8
A = 10,309.12
The amount in the account after 8 years is 10,309.12, subtract the amount of principle, and you will get the amount of interest earned.
10,309.12 - 6,000 = $4,309.12
Interest $ 4,309.12
3 0
4 years ago
The graph of f (x) = x + 5 is a vertical translation 5 units
irakobra [83]

Answer:

A horizontal translation of 5 units to the left.

Step-by-step explanation:

Given the parent linear function:

\displaystyle f(x)=x

To shift vertically n units, we can simply add n to our function. Hence:

f(x)=x+n

So, a vertical shift of 5 units up implies that n=5. So:

f(x)=x+5

As given.

However, to shift a linear function horizontally, we substitute our x for (x-n), where n is the horizontal shift. So:

f(x-n)=(x-n)

Where n is the horizontal shift.

For example, if we shift our parent linear function 1 unit to the right, this means that n=1. Therefore, our new function will be:

f(x-1)=(x-1)

Or:

f(x)=x-1

We notice that this is also a vertical shift of 1 unit downwards.

Therefore, we want a number n such that -n=5.

So, n=-5.

Therefore, it we shift our function 5 units to the left, then n=-5.

Then, our function will be:

f(x-(-5))=(x+5)\text{ or } f(x)=x+5

Hence, we can achieve f(x)=x+5 from f(x)=x using a horizontal translation by translating our function 5 units to the left.

7 0
3 years ago
Which function family is represented by the table?<br> x -5 0 5 10 15 20 y 3 4 5 6 7 8
Ksenya-84 [330]

Domain ( Inputs ) Range (Outputs)

2, 5, 10. 6, 15 , 30

X Y

2. 6

5. 15

10. 30

6 0
2 years ago
I need help when it comes to the elimation method, when one of the equations is in y=mx+b. For example.
user100 [1]

Answer:

x = 431/61; y = -239/61

Step-by-step explanation:

You need to add the two equations to eliminate one variable. If you add the equations as they are now, you will get 14x + y = 95, and as you can see, you still have two variables. You must make the coefficients of one of the variables additive inverses. That way, when you add the equations, one variable will be eliminated since its coefficients add to zero.

Let's work on eliminating y.

The first equation has 5y, and the second equation has -4y. If we multiply both sides of the first equation by 4, the y-term will become 20y. If we multiply both sides of the second equation by 5, the y-term of the second equation becomes -20y. The terms 20y and -20y will add to 0, and the y variable will be eliminated.

9x+5y=44

5x-4y=51​

1) Multiply the both sides of the first equation by 4:

36x + 20y = 176

2) Multiply both sides of the second equation by 5:

25x - 20y = 255

3) Now add the equations:

61x + 0y = 431

61x = 431

Divide both sides by 61:

x = 431/61

Now that we know x, we can substitute y into one of the equations and solve for y. We can also start with the two original equations and do the appropriate multiplications and addition to eliminate x and solve for y.

I'll do elimination of x now, so you see elimination being used again.

Start with the original system again.

9x+5y=44

5x-4y=51​

Multiply both sides of the first equation by -5. Multiply both sides of the second equation by 9.

-45x - 25y = -220

45x - 36y = 459

Now add the new equations.

0x - 61y = 239

-61y = 239

Divide both sides by -61:

y = -239/61

Solution: x = 431/61; y = -239/61

5 0
3 years ago
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