The sum of two numbers is 13 the difference of the same two numbers is -7 find the numbers

Express the following as a function of a single angle, cos(60) cos(-20) - sin(60) sin(-20)

Statement: if two points are given, then exactly one line can be drawn through those two points. which geometry term does the statement represent? defined term postulate theorem undefined term

The revenue each season from tickets at the theme park is represented by t(c)=5x. the cost to pay the employees each season is represented by r(x)=(1.5)^x. examine the graph of the combined function for total profit and estimate the profit after four seasons