A book store gift wraps books using 2 3/8 feet of ribbon for each book. The store uses ribbon from a roll of ribbon that is 265 1/2 feet long. During the holiday season, the store goes through 2 rolls of gift wrap a day. How many books will the store wrap in 7 days?

777

Step-by-step explanation: I'm not 100% sure about this, but we know that divided by is approximately 111, and 7 times 111 is 777, so assuming this, that means they wrap 777 books in 7 days.

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: