At what value(s) of x does f(x) = -x4 + 2x2 have a critical point where the graph changes from decreasing to increasing? A) 0 and -1 only B) 0 and 1 only C) -1 and 1 only D) 0 only

Adriveway is 60-feet long by 6-feet wide. the length and width of the driveway will each be increased by the same number of feet. the following expression represents the perimeter of the larger driveway: (x + 60) + (x + 6) + (x + 60) + (x + 6) which expression is equivalent to the expression for the perimeter of the larger driveway? a) 2(x + 66) b) 4x + 33 c) 4(x + 33) d) 4(x + 132)

Graph y ≥ -x^2 - 1. click on the graph until the correct graph appears.

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a.m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?