PLease help me LOTS of points

15) a) 8

b) y + 2

c) y - 1

16) True

17) 2n - 1, where n is an integer

18) a) 3p + 4q

b) 500 - 3p - 4q

16. 2n = 10

17. 6x + 42 - 6 = 546

18. A.

B. $2.25

Step-by-step explanation:

the formula for the equation of a circle is (x – h)2+ (y – k)2 = r2, where (h, k) represents the coordinates of the center of the circle, and r represents the radius of the circle. if a circle is tangent to the x-axis at (3,0), this means it touches the x-axis at that point.