How many hours is 2: 45 pm to 6: 00 pm ?

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

Aiko jumped rope for 20 min and stopped at 8: 05 when did she start

How would you describe the difference between the graphs of f(x) = 2x2 and g(x) = -2x2?