Jack is 2 2 times as old as lacy. 4 4 years ago the sum of their ages was 31 31. how old are they now?

Whose conclusion is correct? choose all that apply. (two max) elijah emily edward esme

Suppose that the price p (in dollars) and the weekly sales x (in thousands of units) of a certain commodity satisfy the demand equation 4p cubedplusx squaredequals38 comma 400. determine the rate at which sales are changing at a time when xequals80, pequals20, and the price is falling at the rate of $.20 per week.

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)