51. Graph these coordinates: A(1,-1), B(-2, -3), C(-4,0), D(?, ?). What is the fourth coordinate so that the figure is a square? Prove the figure is a square using slope
and distance formula.

Which statement about the relative areas of δabc and δxyz is true? the area of δabc > the area of δxyz the area of δabc < the area of δxyz the area of δabc = the area of δxyz more information is needed to compare.

How many kilograms of a 5% salt solution and how many kilograms of a 15% salt solution must be mixed together to make 45kg of an 8% salt solution?

If f(x) = 3x2 - 2x+4 and g(x) = 5x + 6x - 8, find (f-g)(x).