Find the reference angle in radians: 7pi over 12

Which of the fallowing best completes the sequence 12,8,5, a) 1 b) 2 c)4 d)0

Which statement about the relative areas of δabc and δxyz is true? the area of δabc > the area of δxyz the area of δabc < the area of δxyz the area of δabc = the area of δxyz more information is needed to compare.

Solve each quadratic equation by factoring and using the zero product property. 10x + 6 = -2x^2 -2