15. If Tom brushes his teeth 1 hour a day, how many minutes does Tom brush his
teeth in 2 weeks? What units of time
do you need to change to solve this
problem? Write and solve equations.

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

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.

How do you create a data set with 8 points in it that has a mean of approximately 10 and a standard deviation of approximately 1?