What is the value of the expression? 40÷[20−4·(7−4)] enter your answer in the box.

Start with what is inside the brackets (the innermost ones () )

7 - 4 = 3 Substitute that into the original equation.

40 divide [20 - 4(3)] Now deal with the 4*3

40 divide [20 - 12] Now calculate the square brackets.

40 divide (8)

The answer should be 5 <<<Answer

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what is the answer?

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: