Answer:
30 SQUARE units
Step-by-step explanation:
Since the problem only includes two dimensions, we solve for area, not volume. Area=width*height, or 3*10=30. Because we're solving for area the answer is 30 square units.
5.
3x - 1 = x + 9
Subtract x on both sides
2x - 1 = 9
Add one on both sides.
2x = 10
Divide by 2 to get the x.
x = 5
Hope this helps!
104 is the answer to your problem