Which property was used to simplify the expression. 3c+9+4c=3c+4c+9

the 3rd on is correct

step-by-step explanation:

place r′ so that qr′ is parallel to the tangent.

now we get that ∠r′py=∠pr′q, where y is on the tangent, on the opposite side of p from x.

also, because of the symmetry, ∠r′py=∠qpx.

finally, note that no matter where we place r, as long as it's on the correct arc, we have ∠prq=∠pr′q.

stringing all these equalities together, we end up with ∠prq=∠qpx.

this picture will show how its going to look like.

hope this by jack monhen

answer: approximately 2.878

step-by-step explanation:

you multiply 11 and pi (3.14) then after you have 34.54. the final step is to divide by 12. the final answer is approximately 2.878