Josh has a job to tile a room 16 ft x 18 ft with 1 ft. square tiles. how many tiles does he need?

The highest common factor of 132 and 220

Factor the polynomial 4x4 – 20x2 – 3x2 + 15 by grouping. what is the resulting expression? (4x2 + 3)(x2 – 5) (4x2 – 3)(x2 – 5) (4x2 – 5)(x2 + 3) (4x2 + 5)(x2 – 3)

X+y=-4 x-y=2 use elimination with adding and subtraction