Solve the problem. Do not use a calculator.Find the maximum y-value on the graph of y = - 5x2 - 60x - 181
A. 1
B. 0
C. 6
D. -1
Answer: D
Mathematics
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The following expressions represent denominators of rational expressions. Find their LCD.2(a + 7) and 7(a + 7)
A. 14(a + 7)2 B. 14(a + 7) C. 9(a + 7)2 D. 9(a + 7)
Mathematics
Solve the equation.7x - 7 - 2(x + 1) = -(-3x - 4)
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.The population of a particular country was 24 million in 1981; in 1986, it was 31 million. The exponential growth function 
describes the population of this country t years after 1981. Use the fact that 5 years after 1981 the population increased by 7 million to find k to three decimal places.
A. 0.061 B. 0.051 C. 0.389 D. 1.322
Mathematics
Simplify.2.55 + 2.02 ? 2.09 - 2.92
A. 3.74 B. 3.8518 C. 6.6313 D. -3.7931
Mathematics