Is the ratio 4.2: 1.5 proportional to the rational 12.6: 4.5

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

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5

If 5x - 2 = -12, then x = a) -50 b) -4.4 c) -2.8 d) -2