A bus travels at the constant speed of 35 mi/h. The distance traveled varies directly with the number of hours. Find the total distance after 6 hours.

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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?

Before simplifying, how many terms are there in the expression 2x - 5y + 3 + x?

What is the definition of exponential decay?