One day 20% of the children were away from school on a visit to the museum. If there were369 children altogether, —————— children were in school and —————were on museum trip

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

Combine like terms to make a simpler expression 3z+z

Find two numbers if their sum is 91 and the ratio is 6: 7?