Solve 2cos^2x + cosx − 1 = 0 for x over the interval [0, 2 pi ).

Which of the following expressions is equal to 2x^2+8

If 1/√5+1/√5+1=p+q√r , find the values of p, q and r

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?