What the answe is and how you got it ?

14

Step-by-step explanation:

Age can only be positive. The opposite of his age would be the negative number of his Age.

When he subtracts his age from 45, he gets 31, so to find his age, just subtract 45 & 31:

45 - 31 = 14

His age is 14.

~

3.76%

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.