Inequalities are just like regular equations with only one exception. Which is when yo multiply or divide by a negative number to both sides of the inequality sign you must flip it. But, for this inequality that rule will no apply. So, what I do to make it easier because I know we all see a different sign in an equation and we start to freak out. So, change the inequality sign to an equals sign to get a hang of working with them.
Example of changing an inequality sign to an equals sign:

Addition property of equality

or
Example of keeping the inequality sign

Addition property of equality

Hello,
The correct answer is C) 9 hours and 5 minutes.
Hope this helps!!!! :)
Answer:
it's already in simplest form, as a decimal it would be 8.875
Step-by-step explanation:
-15 = 6x + 15 -10x
1st. You combine like terms
(6-10)x
-15 = -4x + 15
2nd. You move variables to the left side and change the sign
-15 = -4x + 15
+4x +4x
4x - 15 = 15
+15 +15
4x = 30
3rd. You divide both sides of the equation by 4
(4x) /4 = (30) /4
x= 30/4
4th. Reduce the fraction by 2
30/ 4 = 15/2
Answer is 15/2