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borishaifa [10]
4 years ago
13

How to solve C=2πr for r?

Mathematics
1 answer:
Lubov Fominskaja [6]4 years ago
6 0

C = 2πr

divide by 2π

C/2π = r

⭐ Please consider brainliest! ⭐

✉️ If any further questions, inbox me! ✉️

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How is an equation like an expression? How is it different?
morpeh [17]

Answer:

See explanation.

Step-by-step explanation:

An expression is a <u>set of terms that are combined using addition, subtraction, multiplication, or division.</u> The following are examples of expressions:

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Note: expressions do not equal anything.

In contrast, equations are <u>expressions that equal at least one term.</u> The following are examples of equations:

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3 years ago
A satellite is 16800 miles from the horizon of earth. Earths radius is about 4000 miles. Find the approximate distance the satel
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3 years ago
Find the two horizontal and two vertical tangent lines of the equation x^2+xy+y^2=9.
valina [46]
Differentiating w.r.t y,
We get, 

<span>2 x (d x/d y) + y (d x/d y) + x + 2 y = 0 </span>

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d x/d y = 0 </span>

The equation becomes:
<span>x=2 y </span>

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3 0
3 years ago
I need help with this ASAP and can you explain so i can understand?!
Elanso [62]

Answer:

Adult tickets sold =  225

Student Tickets sold =  375

Step-by-step explanation:

Let:

Adult tickets sold = x

Student Tickets sold = y

Total tickets sold = 600

So, we can write: x+y = 600

Total money collected = 3037.50

Cost of 1 Adult ticket = $6.00

Cost of one Student ticket = $4.50

So, we can write: 6x+4.5y=3037.50

Now, we get a system of equations, that if solved we can find values of x and y

Let:

x+y = 600--eq(1)\\6x+4.5y=3037.50--eq(2)

We can solve using substitution method.

Finding value of x from eq(1) and putting it in eq(2)

We\:have\\x+y=600\\x=600-y

Put in eq(2)

6x+4.5y=3037.50\\6(600-y)+4.5y=3037.50\\3600-6y+4.5y=3037.50\\-1.5y=3037.50-3600\\-1.5y=-562.5\\y=\frac{-562.5}{-1.5}\\y=375

So, we get value of y = 375

Now put value of y in eq(1) to find value of x

x+y=600\\Put\:y=375\\x+375=600\\x=600-375\\x=225

So, we get value of x = 225

The Tickets sold will be:

Adult tickets sold = x = 225

Student Tickets sold = y = 375

3 0
3 years ago
Read 2 more answers
Factor 12G+4G+4 and<br><br> 40-10h+9-4h
liraira [26]
Hello : 
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</span><span>40-10h+9-4h = -14h +49 = -7(2h-7)</span>

4 0
4 years ago
Read 2 more answers
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