Judy tries to guess how many people are at a concert, but she guesses 500 too many. Sean guesses 300 too few. The average of their guesses is 3 600. Solve for x, the exact number of people at the concert.
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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?

Combine like terms to make a simpler expression 3z+z

Check all that apply. f is a function. f is a one-to-one function. c is a function. c is a one-to-one function.