Answer:
82
Step-by-step explanation:
2*5 + 9*8 = 10 + 72 = 82
For 1 hour:
- Jennifer can clean 1/2 of her room;
- John cal clean 1/5 of her room.
Both can clean: 1/2 + 1/5 = 5/10 + 2/10 = 7/10
1 hour -------- 7/10
x hours---------- 1
x = 1 : 7/10 = 10/7 h = 1.42857 h ( or 1 h 25 min 43 s )
Answer:
B
Step-by-step explanation:
Answer:
The last one.
Step-by-step explanation:
