Find m by plugging in two sets of values for coordinates. Find v by plugging in two sets of values. Find a by plugging in two sets of values. Find v by plugging in two sets of values. Compute m from this information.
Profit is revenue minus cost.
Compute m from this information. Expand it to get the answer. Check your answer by plugging into it the right values of x. Check your answer by plugging it into that system of equations. Compute m from this information.