The lengths of the sides of a sandbox are 9 ft, 6 ft, and n ft. write a compound inequality that describes all possible lengths of n.

Step-by-step explanation:

According to geometry, the third unknown side cannot be more than the sum of given two, but not less than the difference of given two. This can be write it down as the inequality:

Therefore, the third side is between 3 and 15, not less than 3 feet and not more than 15 feet.

answer: the common difference is -0.10

the solution is 12x-6y