Answer:
45
Step-by-step explanation:

add 6 on both sides to eliminate it(doing this will get us closer to the variable)
x/3=15
multiply both sides by 3
x=45
hope this helps!
Answer: I don’t get the question but I think this is the answers.
Answer:
9
Step-by-step explanation:
at most he can use 9 nickels to get the answer
Answer is C.
Law of cosines.
cos-1(-80/240)