140
25+105+90=220
360-220=140
Answer:
1. -1/2b
2. 3a/b^2
3. 3b^2/1a^2
4. -1a^2b/2
Step-by-step explanation:
Simplified answers and then the variables cancel out each out as much as they can (That's the best way to explain it)
Answer:
3 and 3/4 hours, (3 hours and 45 minutes).
Step-by-step explanation: