F (x) = 1/z+7 what is the domain

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What is the slope simplify your answer and write it as a proper fraction, improper fraction, or integer

Ateacher brought a pack of 17 batteries . each calculator uses 3 batteries . how many calculator can the teacher fill with batteries

The graph of a function f(x)=(x+2)(x-4). which describes all of the values for which the graph is negative and increasing? all real values of x where x< -2 all real values of x where -2