M(-4,1)A(0,4)T(4,0)H(0,-3) prove it is a parallelogram (slope)

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

James is playing his favorite game at the arcade. after playing the game 3 times, he has 8 tokens remaining. he initially had 20 tokens, and the game costs the same number of tokens each time. the number t of tokens james has is a function of g, the number of games he plays. write the function’s formula? t=

These tables represent a quadratic function with a vertex at (0, -1). what is the average rate of change for the interval from x = 9 to x = 10?