F={(-1, 2), (3, 2), (4,2), (0, 2)} Is Fa function and why/why not?

You borrow $25,000 to buy a boat. the simple interest rate is 4%. you pay the loan off after 10 years. what is the total amount you paid for the loan?

Atriangle has side lengths of x, x+11, and 3x+5. what is the perimeter?

Algebraically prove that a clockwise and counterclockwise rotation of 180° about the origin for triangle abc are equivalent rotations.