Pls help me with this

The first floor of marcus’ house is 1,440 square feet. he will cover 1,033 square feet with wood and the rest with tile. a box of tiles will cover 11 square feet. how many boxes of tile does marcus need to buy to cover the floor?

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

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.