what should be subtracted from x square - 2 X Y + Y square minus x + Y + 3 to obtain - X square + 4 x y - 3 y square + 1

Will used 20 colored tiles to make a design in art class. 5/20 of his tiles were red. what is an equivalent fraction for the red tiles?

What values of x satisfy the inequality x^2-9x< 0? how is your answer shown on the graph?

The boiling point of water at an elevation of 0 feet is 212 degrees fahrenheit (°f). for every 1,000 feet of increase in elevation, the boiling point of water decreases by about 2°f. which of the following represents this relationship if b is the boiling point of water at an elevation of e thousand feet? a) e = 2b - 212 b) b = 2e - 212 c) e = -2b + 212 d) b = -2e + 212