How many positive integers, including 1, are divisors of both 40 and 72?

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

The suare root of 9x plus 7 plus the square rot of 2x equall to 7

If f(x) = 4x - 3 and g(x) = x + 4, find (f - g) (x)