Answer:
given the circumference is 30t.
Step-by-step explanation:
The circumference of a circle is 
and the area of a circle is 
assuming the radius is 
for the circle in question.
We are given the circumference of our circle is 
.
If we solve this for r we get: 
. To get this I just divided both sides by 
since this was the thing being multiplied to .
So now the area is 
.
Simplifying this:
.
30/2=15 so:
.
Squaring the numerator and the denominator:
Using law of exponents or seeing that a factor of 
cancels:
Answer
y=-\frac{11}{13}x+\frac{8}{13}
Step-by-step explanation:
Answer:
4n - 13
Step-by-step explanation:
(5+10n)-(18+6n)
Distribute the negative sign.
-1(18)=(-18) & -1(6n)=(-6n)
5+10n + (-18) + (-6)n
Combine like terms.
10n + (-6n) = 4n
(-18) + 5 = (-13)
4n + (-13)
or
4n - 13
<span>A 15° sector in a circle has an area of 11.9 m2. What is the area of the circle?
The area of the circle will be found as follows:
the fraction of the sector=15/360=1/24
the area of the circle will be:
area=(fraction of the circle)/(fraction of the sector)*(area of the sector)
=1/(1/24)</span>×11.9
=285.6 m²
