There are a few answers but an example of one could be 7^10 * 7^5
hope this helps
I am unsure about the very last problem but I can help with the first two
1) (y+1)+4
If we combine the numbers 1 and 4, we get +5 and can isolate the numbers from the variable.
This would give us

2) (6*r)*7
remember that we do not have to explicitly state 6*r
Instead, we can write it as 6r
this helps us get rid of the parentheses
now we can write it as

I hope this helps!:)
Answer:
take a screen shot and then post it
Step-by-step explanation:
mark me brainlist
Answer:
I believe the answer is 12.57
Step-by-step explanation: