Please help me please

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?

Pyramid shown has a square base that is 18 inches on each side has a surface area of 164 square inches what is the slant height

Solve the inequaliy: (x^2+2)(x−2)^2(6−2x)> 0