Answer:
D.
Step-by-step Explanation:
In the attached file
Part A: Charlie's answer is incorrect
In step 2 of Charlie's answer he subtracted 5 from each side. Since 5x is multiplication, he must DIVIDE each side by 5 to get x by itself. The problem should have worked out like this...
Step 1: 5x = 30
Step 2: x = 30/5
Step 3: x = 6
Part B: There is only 1 solution for this problem.
Answer:
It will take them 5 hours.
Step-by-step explanation:
If one is moving towards the other at 30, and the other by 20 more, then the equation would be 30+50, so 80mph.
If the cylinder is closed at both ends the formula is
πdh + 2π(d/2)^2 where h = height and d = diameter
Answer:
17
Step-by-step explanation:
you add the absolute values
