An airplane takes 8 hours to fly an 8000 km trip with the wind. The return trip (against the wind) takes 10 hours. Determine the speed of the plane and the speed of the wind .

Find the area of a trapezoid with a height of 23, base 1 of 10 and base 2 of 18

Find the roots of the polynomial function f(x) = x^3 + 2x^2 + x

Gabriel determined that his total cost would be represented by 2.5x + 2y – 2. his sister states that the expression should be x + x + 0.5x + y + y – 2. who is correct? explain.