PLEASE HELP 10 points for its

Find the required measurements of the following trapezoids. a = 8 cm b = 16 cm h = 10 cm

Which steps could be part of the process in algebraically solving the system of equations, y+5x=x^2+10 and y=4x-10

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