An airplane makes 2,748 flight 6 hours what is the airplanes average rate of speed in miles per hour

Which value of c would make he following expression completely factored? 8x+cy

Write a corresponding real world problem to represent 2x - 125=400

Write a polynomial function f of least degree that has rational coefficients, a leading coefficient of 1, and the given zeros. 3, 4+2i, 1+(sqrt)7 the answer is supposed to be: f(x)=x(^5)-13x(^4)+60x(^3)-82x(^2)- 144x+360 what am i doing wrong?