Answer:
35 ways
Step-by-step explanation:
7×6×5×4. 7×6×5×4
--------------. = --------------. = 35
1x2×3×4. 1×2×3×4
They are essentially asking us to solve:

Solving this equation for x tells us that it will take around 80.1 years for the materials in the vault to reduce to 357 pounds.
Answer:
-6 and -5 (There are many more combinations of numbers that can equal to -11 but this is just one of the many possibilities.
Step-by-step explanation:
-6 and -5
See you can write it like this,
-6+ (-5)
= -6-5
=-11
Answer:

Step-by-step explanation:
Simplify the radical by breaking the radicand up into a product of known factors.
Like this :