Help I don’t understand

Players on the school soccer team are selling candles to raise money for an upcoming trip. each player has 24 candles to sell. if a player sells 4 candles a profit of$30 is made. if he sells 12 candles a profit of $70 is made. determine an equation to model his situation?

Write the sine and cosine values of a, b, respectively, in the figure for (1) and (2) + explanation.

What is the missing reason in the proof? segment addition congruent segments theorem transitive property of equality subtraction property of equality?