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OleMash [197]
3 years ago
6

What is the area of a circle if the circumference is 30cm (express your answer in centimetres)

Mathematics
1 answer:
kykrilka [37]3 years ago
4 0

So before we can find the area, we first have to find the radius. We will do this by using the circumference formula, C = 2πr, to find the radius. Our equation will look like this: 30 = 2πr .


For this, all you need to do is divide both sides by 2π, and your answer will be 4.77 cm = r.



Now that we got the radius, we can solve for the area, which is A = πr^2.


A = π(4.77)^2

A = 22.7529π cm^2 or 71.48 cm^2

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Your waiter at a restaurant suggests you leave a tip of $10 on a $50 bill. What percentage is that?
Bezzdna [24]

Answer:

20%

Step-by-step explanation:

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\frac{10}{50}=0.2

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6 0
3 years ago
How do you find the minimum value of a quadratic function?
aniked [119]

The minimum value of a function is the place where the graph has a vertex at its lowest point.

There are two methods for determining the minimum value of a quadratic equation. Each of them can be useful in determining the minimum.

(1) By plotting graph

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(2) By solving equation

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If our equation is in the form y = ax^2 + bx + c, you can find the minimum by using the equation min = c - b²/4a.

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3 years ago
Solve graphically please send me by solving and clicking photo plzzzz​
Delicious77 [7]

Answer:

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y=17−5x/7

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Subtract x from both sides of the equation.

y=1/7−5x/7

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y=1/7−5x/7

Divide each term by 4 and simplify.

y=1/7−5x/7

y=−5/4−x/4

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Create a graph to locate the intersection of the equations. The intersection of the system of equations is the solution. (3,−2)

Step-by-step explanation:

8 0
2 years ago
10 is equal or less than j + 5
azamat

Answer:

10 is equal or less than (sign that opens up to the right with line underneath) j+5

5 0
3 years ago
Read 2 more answers
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