Answer:

Step-by-step explanation:
We can try and isolate m on one side of the equation by following the rules of simplifying equations.

Hope this helped!
Answer:
27. C
28. D
Step-by-step explanation:
The average of all grades in his fencing class, including the upcoming one, (all grades summed up divided by the amount of grades) must be equal to 86 (percent), hence C is the right answer for 27.
Solving this equation gives:

So D is the right answer for 28.
i am pretty sure it is -2/25, 14/40, 7
Step-by-step explanation:
The watch costed $400 before the discount.
76 * 100 = 7,600
7,600 / 19 = 400