Zax's sister is 3 years older than him. Their mum's age is twice of Zax's age today. Their mum gave birth to Zax's sister at the age of 28. How old is Zax today?

1) 2/5

2) zero=0/1

3) zero=0/2

4) -4/5

5) undefined=3/0

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.