I need help with this.​

Solve the equation using the given values: x= -2.5; y= -7.51. 2xy + 2x²

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?

Write 17/20 as a decimal and as a percent.