Answer:
c is the supplement angle
The constant of proportionality is the ratio between two directly proportional quantities. Two quantities are directly proportional when they increase and decrease at the same rate.
You can just summarize this if you want.
Hope this helped!
31 is 25x3+8x3=51 because you multiply each of the numbers for it to equal 51
You probably made an error while writing the options.
The correct ans is: 
Entry Fee for the player is $11.
Player is charged $1 for each game played. So for x games played, the charges will be $ x.
So, total charges for x games played will be:
T(x) = 11 + x
Average Cost per game played = Total Cost/Total Games played
So,
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