Idk lol. A contractor cut a slab of wood into 2 semicircles then he put them together.
Basically just substitute t+2 for every x
f(t+2)=3(t+2)+9
f(t+2)=3t+6+9
f(t+2)=3t+15
Idk where the square roots are supposed to come from tho
a square has four equal sides so 12 ÷ 4 = 3, so each side is 3 then, 3+3+3+3 = perimeter.
check the picture below.
35 out of 100 play soccer...
35/100 = 7/20 = 0.35 = 35%