Eric traveled to three cities on a single highway. the distance from his original location to the first city was 100 miles more than the distance from the first city to the second city. the distance from the second city to the third city was 10 miles less than the distance from the first city to the second city. if the distance from his original location to the first city and the distance from the second city to the third city were the same, what was the total distance eric traveled?
a. 120 miles
b. 200 miles
c. 280 miles
d. 360 miles
e. 400 miles

answer: 230 miles ( vote ! )

step-by-step explanation:

180.39 minus 17.99 equals 162.4

then divide 162.4 by .80 to get 230

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: