A paper airplane was thrown from the top of a tall building. The height of the paper airplane above the ground can be found using the function   y  =  −1.5x + 60 
where x is the time in seconds the airplane has been in the air.

 How many seconds did it take the paper airplane to reach the ground?

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