Need help with these dont really understand geometrey teacher teaching algebra 2 badly

Janet drove 300 miles in 4.5 hours. write an equation to find the rate at which she was traveling

Select the correct answer from each drop-down menu. consider the following polynomials equations. 3x^2(x-1) and -3x^3+ 4x^2-2x+1 perform each operation and determine if the result is a polynomial. is the result of a + b a polynomial? yes or no is the result of a - b a polynomial? yes or no is the result of a · b a polynomial? yes or no

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