Why is no one answering any of my questions :(

Select the best attribute for the angle pair formed by two parallel lines intersected by a transversal.

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 are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.