Please help will give brainliest.

1st and 3rd options

Step-by-step explanation:

substitute the coordinates of each point into the left side and compare answer to right side.

(0, 2 )

2(2) - 0 = 4 - 0 = 4 > 1 ← solution

(8, )

2( ) - 8 = 1 - 8 = - 7 < 1 ← not a solution

(- 6, 3 )

2(3) - (- 6) = 6 + 6 = 12 > 1 ← solution

(- 7, - 3 )

2(- 3) - (- 7) = - 6 + 7 = 1 ← not a solution

80π/3 or about 83.775

step-by-step explanation:

since a cone is 1/3 of a cylinder, we need to find the base's area. since area = πr^2, we get 16π. then, multiplying this by 5, we get 80π. dividing by 3, since the cone's volume is 1/3 of that of a cylinder's, we get 80π/3.

hope this !

guess at question:

a vertical line intersects the graph of g(x,y) = 0 at two points. what conclusion follows about the function f(x) implicitly defined by g(x,f(x)) = 0?

the domain of f(x) cannot include the x coordinate of any such vertical line.

informally, f(x) is not a function, and

g(x,y)=0 cannot be solved for y uniquely.

the relation r = {(x,y) such that g(x,y) = 0} is a function if

for all (a,b) ∊ r and (c,d) ∊ r, a=c implies b=d.

step-by-step explanation: