En una academia de música el número de personas que estudian violín es la mitad de
los que estudian piano. Calcula el número de
personas de cada grupo si en total son 240.

idk this answer sorry cant on this one.

step-by-step explanation:

idk

step-by-step explanation: i just don't

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:

the opening of this porabola is facing up

step-by-step explanation: