Answer:
15
Step-by-step explanation:
Let's call the mystery number x.

Hope this helps!
You can go 720 days without wearing the same 4 items.
Answer:
0.9
Step-by-step explanation:
Answer:
A triangle with side lengths 4 cm, 5 cm, and 15 cm
Step-by-step explanation:
In order to form a triangle with given side lengths, sum of any two sides must always be greater than the third side.

Answer:
-2m^2+3m-4
Step-by-step explanation:
\frac{-2m^3+m^2-m-4}{m+1}