Solve. Graph the solution on a number line, and express it in interval notation.1 ? 2x - 3 ? 9
A. -6 < x < -2, (-6, -2)
B. 2 < x < 6, (2, 6)
C. -6 ? x ? -2, [-6, -2]
D. 2 ? x ? 6, [2, 6]
Answer: D
Mathematics
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A. 
B. 
C. 
D. 
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Identify the fraction as a proper fraction, an improper fraction, or a mixed number.
A. Improper fraction B. Proper fraction C. Mixed number
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Find the slope and the y-intercept of the line.3y + 7x = -8
A. m = -7; b = -8
B. m = 3; b = 0
C. m = 
; b = 0
D. m = - 
; b = - 
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Solve the problem.An airplane flying faster than the speed of sound creates sound waves that form a cone. If ? is the vertex angle of the cone and m is the Mach number for the speed of the plane, then 
Find the Mach number to the nearest tenth if 
A. 1.7 B. 1.4 C. 2.6 D. 2.4
Mathematics