if there are 3 classes of students who are taking additional mathematics. there are 42 students in class A and 40 students in class B. Students in class A constitute 35% of the total number of students taking additional mathematics find the number of students in class C

answer: r there any options?

step-by-step explanation:

hi there!

the answer will be d: 2

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: