You are given the opposite side length and the hypotenuse, so use sine
choice a
Answer:wow
Step-by-step explanation:
Answer:
Need the radius if you are finding the exact arch length. but if angle, X is 15 so just sub it in.
Answer:
AB
Step-by-step explanation:
Using FOIL (first outer inner last) u can determine that the final term will be produced by multiplying the last terms in each bracket. These are A and B, so the final term of the resulting trinomial is AB.
You can check this by fully expanding (x + A)(x + B):

the terms B and A are usually numbers, so Bx and Ax tend to get added together to form a middle term. hope this helps!