Apack of gum costs 75 cents. that is 3 cents less than three times what the pack cost 20 years ago. write an equation that could be used to find the cost of the gum 20 years ago.

What is always true when two whole numbers are subtracted?

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle

Graph a triangle (xyz) and reflect it over the line y=x to create triangle x’y’z’. describe the transformation using words. draw a line segment from point x to the reflecting line, and then draw a line segment from point x’ to the reflecting line. what do you notice about the two line segments you drew? do you think you would see the same characteristics if you drew the line segment connecting y with the reflecting line and then y’ with the reflecting line? how do you know?