help with these pls

1. If f (x) = x - X and x - 1 g(x) = x is it true that f = g?2. 1 0 1 X The graph of a function f is given. (a) State the value of f(1). (b) Estimate the value of f(-1). (c) For what values of x is f (x) = 1? (d) Estimate the value of x such that f(x) = 0. (e) State the domain and range of f.3. The graph shows the power consumption for a day in Septem- ber in San Francisco. (P is measured in megawatts; t is mea- sured in hours starting at midnight.) (a) What was the power consumption at 6 AM? At 6 PM? (b) When was the power consumption the lowest? When was it the highest? Do these times seem reasonable? P 800 600 400 200 0 3 6 9 12 15 18 t Pacific Gas & Electric4. Find the domain of the function. f (x) = x + 4 x2 - 9 a ) 2x3 - 5 f (x) = b ) x2 + x - 6 g(t) = V3 - t - 12+t c )