<h2>
Hello!</h2>
The answer is:

<h2>
Why?</h2>
To solve the problem we need to add/subtract like terms. We need to remember that like terms are the terms that share the same variable and the same exponent.
For example, we have:

We have that we were able to add just the terms that were sharing the same variable and exponenr (x for this case).
So, we are given the expression:

Hence, the answer is:

Have a nice day!
Answer:
4 hours and 10 min
Step-by-step explanation:
For this equation we will do ratios:

250 min =
4 hours and 10 min
4(60) = 240
240 + 10 = 250 minutes
Answer:
D. Angles 4 and 7
Step-by-step explanation:
-3 = 5 - 4x
Add both sides by 4x
4x - 3 = 5
Add both sides by 3
4x = 8
Divide both sides by 4
x = 2
That's your answer. Have an awesome day! :)
- Your friendly Helper-in-Training