What is an extraneous solution? How does it arise in solving radical equations?

Tom wants to order tickets online so that he and three of his friends can go to a water park the cost of the tickets is 16.00 per person there is also a 2.50 one-time service fee for ordering tickets online write an expression in term of n that represents the cost for n ordering tickets online

When a rectangle is dilated, how do the perimeter and area of the rectangle change?

What does the sign of the slope tell you about a line?