2. Della gives riding lessons at her grandparents' horse farm. In a typical five-day work week, she gives 15 lessons and makes $300. Her cost of food sold is $3.50 per lesson.

What is the unit of sale?

What is the gross profit per unit?​

f-1(x)= cube root of 19x squared/x

step-by-step explanation:

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: