20 points1: in 6th grade john could do 6 pushups. in 7th grade, he can do 10 more. percent increase? 2: the costs of a new macbook is $849. best buy is having a 20% off sale, but a 6% tax is added after the discount. how much do you have to pay?

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

How long does it take natsumi to clean up after she is done? table: .area time30. 245. 2.7560. 3.5

Ahighway between points a and b has been closed for repairs. an alternative route between there two locations is to travel between a and c and then from c to b what is the value of y and what is the total distance from a to c to b?