Solve the equation by making an appropriate substitution.x4 - 23x2 - 50 = 0
A. {-5, 5, -i
, i
}
B. {5, i
}
C. {-25, 2}
D. {- 
, 
, -5i, 5i}
Answer: A
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Simplify the expression by combining like terms.8y2 + 13y2
A. 21y
B. 
y2
C. 21y2
D. 21y4
The bar graph below shows the temperatures recorded as the high temperature in Little City on Brianna's birthday for the indicated years. 
In which year was the temperature closest to 0° C?
A. 2003 B. 1998 C. 2001 D. 2002
Solve the system. 7x + 4y - z = 64 x - 3y - 8z = -13 9x + y + z = 68
A. ? B. {(7, 4, 1)} C. {(-7, 4, 14)} D. {(7, 1, 4)}
Solve the problem.This chart shows the number of meals served in a restaurant during each of the past 4 months. Write the information in the chart as a set of ordered pairs.
A. {(1000, January), (1057, January), (1041, January), (1062, January)} B. {(1000, January), (1057, February), (1041, March), (1062, April)} C. {(January, 1000), (February, 1000), (March, 1000), (April, 1000)} D. {(January, 1000), (February, 1057), (March, 1041), (April, 1062)}