{20, 30, 40, 50, 60, 70, 80} The mean of this set of numbers is A) 20 B) 50 C) 55 D) 60
2 answers:
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Answer: Third option
Step-by-step explanation:
One of the ways of solving a system of equations is by equating the equations and solving for one of the variables.
In this case we have the system:
Note that if is equal
and also
equals
Then logically must be equal to
.
We write equality.
Then the correct answer is the third option.
We can also solve for the variable x