4. The following piecewise function is an example of a step function.
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f(x) =
where x can be any number except 0.
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a. Why is the number 0 excluded from the domain?
b. What is the range of f?
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c. Create a graph of f.
d. Express fas a piecewise function.
e. create a table

Which linear inequality is represented by the graph? !

The function a represents the cost of manufacturing product a, in hundreds of dollars, and the function b represents the cost of manufacturing product b, in hundreds of dollars. a(t) = 5t + 2 b(t) = 7t - 2t +4 find the expression that describes the total cost of manufacturing both products, a(t) + b(t). a. 7t^2 - 7t + 2 b. 7t^2 + 3 +6 c. 7t^2 + 7t - 6 d. 7t^2 - 3t + 6

Which expressions equal 9 when x=4 and y=1/3 a. x2+6y b. 2x + 3y c. y2-21x d. 5 (x/2) -3y e. 3x-9y