Answer:
None of them are correct. They only thought of combining like terms, which isn't the case.
Step-by-step explanation:
(3^5 6^8)(3^9 6^10) =
(3^5+9) + (3^5 6^10) + (6^8 3^9) + (6^8+10) =
3^14 + (3^5 6^10) + (6^8 3^9) + 6^18
Answer:
+ (+9) = -9
Step-by-step explanation:
- (-9) = 9 A negative times a negative is a positive
- (+9) = -9 A negative times a positive is a negative
+ (-9) = -9 A positive times a negative is a negative
+ (+9) = -9 A positive time a positive is a positive
Let 
be the number of liters of the 10% solution she needs to use. She'd end up with a 6% solution with a volume of 
liters. The starting solution contains 0.04*9 = 0.36 liter of salt. Each liter of the 10% solution contributes 0.1 liter of salt, so that
Solve for :
so Mayra needs to add 4.5 liters of the 10% solution.
