Solve the problem.A freight train leaves a station traveling at 32 km/h. Two hours later, a passenger train leaves the same station traveling in the same direction at 52 km/h. How long does it takes the passenger train to catch up to the freight train?
A. 5.2 hr
B. 2.2 hr
C. 4.2 hr
D. 3.2 hr
Answer: D
Mathematics
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Solve the system by elimination. If the system is inconsistent or dependent, say so.
A. (0, -6) B. (0, 6) C. (-6, 0) D. (6, 0)
Mathematics
Solve the polynomial inequality. Express the solution in interval notation.x3 + 3x2 > x + 3
A. (-?, - 3) ? (-1, 1) B. (- 3, -1) ? (1, ?) C. (-?, - 1) ? (1, 3) D. (-1, 1) ? (3, ?)
Mathematics
Simplify the expression by combining any like terms.5x2 - 2x - 2 + 6x + 7 + 5x2
A. 10x4 + 4x2 + 5 B. 3x2 + 11x + 5 C. 10x2 + 4x + 5 D. 19x3
Mathematics
Solve the formula for t.
?
Simple interest formula:
?
A. 
B. 
C. 
D. 
E. none of these
Mathematics