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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?

Identify the number 127 as a rational or irrational. explain

Prove that 16^4-2^13-4^5 is divisible by 11.