Which answer choice represents an equivalent number sentence that uses the associative property to rewrite "[(-4) x (-3)] x (-5)"? A. (-4) x [(-3) x (-5)]
B. -12 x -5
C. -4 x -8
D. -60

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

Im literally having a mental breakdown

Select the correct answer from each drop-down menu. a system of equations and its solution are given below. system a complete the sentences to explain what steps were followed to obtain the system of equations below. system b to get system b, the equation in system a was replaced by the sum of that equation and times the equation. the solution to system b the same as the solution to system a.]