Does f(x) = 5-4x-x^2 have maximum or minimum

An ulcer medication has 300 milligrams in 2 tablets. how many milligrams are in 3 tablets?

How many solutions does the nonlinear system of equations graphed bellow have?

How is the equation of this circle written in standard form? x2 + y2 - 6x + 14y = 142 a) (x - 3)2 + (y + 7)2 = 200 b) (x+ 3)2 + (y - 7)2 = 200 (x - 6)2 + (y + 14)2 = 142 d) (x+6)2 + (y- 14)2 = 142