W>10. 80-2w>50 subtract 80 on both sides and then divide by negative two.
A cube has 6 sides, and each side has the area of 16 (since 4 times 4 is 16) so if you multiply 16 and 6 you get 96 mm2 as the surface area.
The answer is the fourth one.
-10 < x - 9
Reverse the equation to get x on the left side"
x-9>-10
Add 9 to both sides:
X >-1
Answer: x > -1
