Show work and explain with formulas.

picture attached:

14. evaluate

15. find the sum:

16. express using sigma notation: 1 + 4 + 7 + 10 + 13

14 28  

Step-by-step explanation:

15A 49  

Step-by-step explanation:

15B 12  

Step-by-step explanation:

16

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:

step-by-step explanation: