Solve.-46.52 = 8.6x + 6.8
A. -66.92
B. -7.8
C. -53.32
D. -6.2
Answer: D
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Factor completely.x2 - x - 63
A. (x - 63)(x + 1) B. (x - 7)(x + 9) C. Prime D. (x + 7)(x - 9)
Simplify the expression.y ? y3
A. y3 B. y4 C. 2y3 D. 2y4
Solve.The formula P = 0.61x2 - 0.041x + 1 models the approximate population P, in thousands, for a species of fish in a local pond, x years after 1997. During what year will the population reach 50,041 fish?
A. 2005 B. 2008 C. 2007 D. 2006
Solve the problem.The table lists the amount of emissions of a certain pollutant in millions of tons.
If t = 0 corresponds to 1980, and t = 5 corresponds to 1985, find a quadratic function that fits the data. Use the function to estimate the amount of emissions in the year 2010.
A. 38.7 million tons B. 40.8 million tons C. 31.0 million tons D. 35.6 million tons