Plz hlp translate the following phrase to an expression: the difference between twenty and twice a number.

20 + 2n
20 - n
2n - 20
20 - 2n

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.

Given: and prove: what is the missing reason in the proof? given transitive property alternate interior angles theorem converse alternate interior angles theorem

F(n + 1) = f(n) – 8. if f(1) = 100, what is f(6)?