Determine whether the variable is qualitative or quantitative. number of flights

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 (28 + 7 + 6 + 3) x 1/2 show your work

What expression is equivalent to (2x-1)(x-3)?