Does the set of numbers 13 21 and 24 form a Pythagorean triple explain​

Y+ 2/y is it a polynomial in one variable or not? and if so, why?

Jonathan puts $400 in a bank account. each year the account earns 6% simple interest. how much interest will be earned in 5 years?

Which equation is graphed here? a) y = -3x + 3 b) y = -3x - 3 c) y = -1 3 x +3 d) y = -1 3 x -3