Answer:
The first answer: 5bk + 5b + k
Step-by-step explanation:
Now, you might say it would be the 10bk one, but that's not right.
The only you can get two variables together is through multiplication. That's why 10bk would not work.
Answer:the total trip, and I should be right, was 7 miles. He rowed up for 3 hours, and back for 1.
A.
3x+3 (x+y)
distribute what is inside the bracket.
3x + 3x +3y
add the like terms
6x+3y