CAN SOMEONE HELP ME ASAP

Find the gradient of the line 2y = -10x + 1

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)

Find the volume of the solid whose base is the region bounded by f(x), g(x) and the x-axis on the interval [0, 1], and whose cross-sections perpendicular to the y-axis are squares. your work must show the integral, but you may use your calculator to evaluate it. give 3 decimal places for your answe

Tom travels between the two mile markers shown and then finds his average speed in miles per hour. select the three equations that represent this situation.