Idont think i did this right someone pleas

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 is the solution set of the quadratic inequality x^2-5< or equal to 0

Add the fractions and simplify 1/2+ 1/3