Answer:
Step-by-step explanation:
The area for the sector of a circle is
where theta is the measure of the central angle. We have some given values to fill in:
Area is 64π and the central angle is 90°, so all we have left to find is the radius. Filling into the equation:
![64\pi =\frac{90}{360}*\pi r^2](https://tex.z-dn.net/?f=64%5Cpi%20%3D%5Cfrac%7B90%7D%7B360%7D%2A%5Cpi%20%20r%5E2)
Let's get that solved for r-squared first:
Doing all the math on that gives us:
![256=r^2](https://tex.z-dn.net/?f=256%3Dr%5E2)
Take the square root of both sides and get that r = ±16. BUT we know that lengths cannot be negative, so we disregard the -16 and say that the radius is 16 inches.
When adding and subtracting with exponents....combining like terms....exponents are not added/subtracted...but coefficients are.
example : 2b^2 + 3 + 3b^2 = 5b^2 + 3
but keep in mind, they have to be like terms to be able to add and subtract them...for instance 2b^2 + 3b^3...u cannot add/subtract them because they are not like terms.
Answer:
x = 6
Step-by-step explanation:
y becomes 4x + 6 due to substitution
4x + 6 = 4x + 6
6 = 6
x = 6
Answer:
B.
Step-by-step explanation:
For reference, the median for housecats is 11 and the median for small dogs is 9. So, by process of elimination, B is the correct answer.