Use the "mixed partials" check to see if the following differential equation is exact. if it is exact find a function f(x, y) whose differential, df(x, y) gives the differential equation. that is, level curves f(x, y)=c are solutions to the differential equation: dydx=3x3+2y−2x−y2 first rewrite as m(x, y)dx+n(x, y)dy=0 where m(x, y)= equation editor equation editor , and n(x, y)= equation editor equation editor . if the equation is not exact, enter not exact, otherwise enter in f(x, y) as the solution of the differential equation here

What is the value of x when x + 7 = 21?

Each cookie sells for $0.50 sam spent $90 on baking supplies and each cookie cost $0.25 to make how many cookies does sam need to sell before making a profit formula: sales> cost

The table below represents the displacement of a fish from its reef as a function of time: time (hours) x displacement from reef (feet) y 0 4 1 64 2 124 3 184 4 244 part a: what is the y-intercept of the function, and what does this tell you about the fish? (4 points) part b: calculate the average rate of change of the function represented by the table between x = 1 to x = 3 hours, and tell what the average rate represents. (4 points) part c: what would be the domain of the function if the fish continued to swim at this rate until it traveled 724 feet from the reef? (2 points)