Someone help me with this question please I am confused

Which equation can be simplified to find the inverse of y = 2x2?

How far is x from 5 on a number line?

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?