What is the initial value for the equation: y = (0.85)^x

How many sides does a regular polygon have if each exterior angle measures 72a.3b.4c.5d.6

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827

Heather is writing a quadratic function that represents a parabola that touches but does not cross the x-axis at x = -6. which function could heather be writing? fx) = x2 + 36x + 12 = x2 - 36x - 12 f(x) = -x + 12x + 36 f(x) = -x? - 12x - 36