Help please will be markedas brainliest if correct

3x(7+10)=G+30

21x+30=G+30

-30 -30

21x=G

G=21x

5x(3+H)=15+45

15x+5h=15+45

-5 -5

15x+h=15+40

-15 -15

x(h)=40

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.