Evaluate the expression 4/5 + 3/4

31/20

Step-by-step explanation:

4/5 + 3/4

taking lcm of 5 and 4 which is 20

4/5 + 3/4

(4*4 + 5*3) / 20

(16 + 15) /20

31/20

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: