Verify the identity. cos (x - y) - cos (x + y) = 2 sin x sin y

The system of equations graphed below has how many solutions?

Ivan began dividing g2  – 6 by g + 1, noting that . he started by placing g in the quotient, as shown below.what is g2  – 6 divided by g + 1? g –  1 –  g + 1  – g  –  7 + g  –  5  + 

Solve the equation - 2(m -30) = -6m a-15 b-13 c-8 d8