Step-by-step explanation:

The quadratic formula is honestly the most straightforward way of solving here.
Your other options are completing the square (which is the same thing as the quadratic formula but it's good to know that method if you have to take Integral Calculus at some point) or maybe factoring by grouping if it's appropriate. But the quadratic formula will work for you in all three equations:
1) a=1, b=0, c=8
This reduces pretty quickly into x=8i,-8i due to the negative under the radical. (Actually we didn't even really need the formula here.)
2) a=-9, b=4, c=-10
This reduces into x=(-4+i√(344))/-18, (-4-i√(344))/-18 and doesn't go any further because 344 isn't a perfect square.
3) a=1, b=8, c=17
This reduces to x=(-4+i), (-4-i)
So those are the answers for each.
3 cuz 15/5 is 3. Also it’s fair if it’s 12 am cuz lol
Answer:
Step-by-step explanation:
Slope of HI = slope of DE
= (24-32)/(12-8)
= (-8)/4
= -2
The answer is 306.0000 square units.
This is asking you how far around that specific portion of the circle did the needle travel. I'm guessing you're in geometry and you're doing circle stuff right now. This is the arc length. The formula is

which is a combination of the circumference of a circle and its central angle. Our situation will look like this:

If you leave your answer in terms of pi it would be

or if you multiply it in, then your answer will be 34.9