Please answer this correctly

What value of x is in the solution set of –5x – 15 > 10 + 20x?

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?

Find percent notation for 0.008 0.008=