Answer: how come you don't know the answer what grade are you in
Answer: 13x
Step-by-step explanation: Since 8x and 5x are like terms, we can add them together.
8x+5x=13x
Have a nice day! :)
Answer: (d)- 
Step-by-step explanation:
Suppose 'b' is the number of bagels
It is to be divided into 15 bags
So, we use the divide operator i.e.

Answer:
1600
Step-by-step explanation:
40*40
Answer:
yes
Step-by-step explanation:
they start from the same place so ya, that is proportional