Sierra started with 340 cans of food. She collects 5 more cans every day. Brian started with 650 cans of food. He collects 8 more cans every day. What’s is x, the number of days that need to pass in order for Sierra and Brian to have the same number of cans of food?

muyb ajo

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jegosu

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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.

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69.64%

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