I need help with a) and c). My teacher didn’t really go over this in class. ;(

Two blends of tea are mixed to make a blend that will be sold at the fair. black tea sells for $2.20 per pound and orange pekoe tea sells for $3.00 per pound. how much of each should be used to obtain a 4lb blend selling for $2.50 per pound?

What could explain what happened when the time was equal to 120 minutes

Two angles are complementary. the large angle is 36 more than the smaller angle. what is the measure of the large angle?