Rich wrote a novel that sells for n dollars each. He received a bonus of $50,000 to sign the
contract to write the book, and he receives 9% commission on each book sale. Express the total
amount of income he earns from selling b books algebraically.

If x=-3 is the only x-intercept of the graph of a quadratic equation, which statement best discribes the discriminant of the equation?

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Imogene invested $8,000 in a bank account that pays 8 percent simple interest at the end of each year. her friend invested the same amount in stocks where the growth of the investment is represented as 2,000 times the square root of 2 less than the time lapsed in years. if y1 and y2 represent the amount earned in dollars and t is the time lapsed in years, which system of equations correctly represents the situation?