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:

Step-by-step explanation:
Rule: 

The answer is 42 feet I use substitution and subtract by 8
Answer:
37°
Step-by-step explanation:
(4x + 2)° = 150° [Vertically Opposite Angles]
=> 4x = 150 - 2
=> 4x = 148

=><u> x = 37° (Ans)</u>
Answer:
I can't really see anything in here could you make the photo up close. Please thanks, I really want to help you :)))
Step-by-step explanation: