Hi can you help me It’s a quizz

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angles. measure need asap

In two or more complete sentences, determine the appropriate model for the given data and explain how you made your decision. (1,-1), (2,0.5), (5,1.5), (8,2)

Astore has clearance items that have been marked down by 60%. they are having a sale, advertising an additional 55% off clearance items. what percent of the original price do you end up paying?