X = Leonard, y = Liam
x = y + 7
3x + 2y = 96
now we sub
3(y + 7) + 2y = 96
3y + 21 + 2y = 96
5y = 96 - 21
5y = 75
y = 15
x = y + 7
x = 15 + 7
x = 22
<span>Liam has 15 and Leonard has 22. </span>
Ok so as it says, the equation for the circumference (C) is C=2(pi)r.
Pi is about 3.14, so all you have to do is multiply those three values together for the circumference.
C=2•3.14•4
C= 25.12
So the answer would be D, 25.12.