A, B, and C are all equal to the ratio 7:5
If you simplify each of the numbers in A, B, and C, you will find that they will come to equal 7:5
Answer:

Step-by-step explanation:
To navigate through this problem, start by finding how much each senator can complete in a fixed amount of time. I'll choose 10 as it's the greatest common factor of 30 and 50.
In 10 minutes, the junior senator can complete
of the labyrinth.
In 10 minutes, the senior senator can complete
of the labyrinth.
Therefore, working together, they can complete
of the labyrinth in 10 minutes. Thus, it will take them
to complete one labyrinth.
The amount of time it take them to complete 12 labyrinths is then 
The correct answer is letter C; -6,
-5 2/5 or -27/5 and -4 1/5 or -21/5.
You can find this answers by substituting 1, 4, and 10 into the letter n.
Then you follow the operational order to get the answer.
A line perpendicular means that the slope is the negative reciprocal of the slope given. Since m=3 in the given equation, the slope in the perpendicular line has to be m = -1/3. The y-intercept can be any number.
So a line perpendicular would be y = -1/3x + b
Since you can plug anything into b, you can get many different answers. For example, y = -1/3x + 7 or y = -1/3x - 2
to make the proportion we make the ratio of the similar sides
For example
4/8 = 12/x
or we can write it as 4/12 = 8/x
or 12/x = 4/8
So last option is correct