The present temperature is 5°c. the weather forecaster expects the temperature to fall 8 degrees during the night. how cold will it get?

a. -3°c
b. 3°c
c. -13°c
d. 13°c

-3°C

Step-by-step explanation:

because 5 minus 8 = -3

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:

d. all of the above

step-by-step explanation: