-6y^2 + 9y^2 - y - 9 - 7y^2 + 1 + 10y + 3y simplify the expression by combining like terms right the terms from highest to lowest power of the valuable

Which sum or difference identity would you use to verify that cos (180° - ∅) = -cos ∅? a. sin (α -β) = sin α cos β – cos α sin β b. cos (α -β) = cos α cos β – sin α sin β c. cos (α -β) = cos α cos β + sin α sin β d. sin (α + β) = sin α cos β + cos α sin β

What is the solution to the system of equation graphed belowa.(0,-4)b.(2,5),1),-3)

Convert 3,200,000 to a scientific notation.