book Maths Puzzle Numerical Ability

The winning car in a race had an average speed of 203.7 miles per hour. This was b miles per hour faster than the second-place car. Write an expression for the average speed of the second-place car.

Read Solution (Total 0)

book Other Question
One factor of x^3+2x^2-11x-12 is x+4. Find the remaining factors.

The answer I came up with is x-1;x+3.

Is this correct? Write an equation for the parabola with focus (1,3) and vertex (0,3).

Thanks