There are 70 students in speech contest . yesterday 1/5 of them gave their speeches . today 3/7 of the remaining students gave their speeches . how many students still haven't given their speeches

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

Can someone pls ! pls answer all. no explanation needed..

Find the equation of the line with slope =8 and passing through (6,53) write your equation in the form y=mx+b