What is the sum of 4 , −2 , and 6

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?

Justin has 750 more than eva and eva has 12 less than justin together they have a total of 63 how much money did

What is the solution set for z+10=z-2