Answer:
10 trips
Step-by-step explanation:
He wants 23 km total, and each trip is 1 km.
He already has 13 km, so all you need to do is 23-13=10, so he needs 10 trips
The first one is correct I think.
Answer: 
Step-by-step explanation:
Give expression is,

Since L.C.M ( 12, 8 ) = 24





Answer:
3^6 i think
Step-by-step explanation: