Answer:
(n+54)/9 = 21
Step-by-step explanation:
A number: n
Is increased by 54: n+54
The sum is divided by 9: (n +54)/9
and the result is 21:
(n +54)/9 = 21
Given:
The bases of trapezoid measuring 4 m and 12 m.
To find:
The median of the trapezoid.
Solution:
The median of the trapezoid is the average of its bases.

The bases of trapezoid measuring 4 m and 12 m. So, the median of the trapezoid is:



Therefore, the correct option is C.
The answer is C because if you put

Find the reflected two points which are:

They're just flipped equations