(50-3x)-(-20+4x) = 0
50-3x+20-4x = 0
70-7x = 0
-7x = -70
7x = 70
x = 10
If you multiply out the answers, which is easier, then you can find the correct answer.
The factors need to multiply together to create the original problem, so it's just a matter of plug and chug.
The answer is B.
Answer:
(13; 36)
Step-by-step explanation:
To calculate the mean, you must add all the numbers together and then divide by the total amount of numbers there are.
The mean score of all these numbers would be 80.875, or 80 rounded to the nearest hundredth.