Solve the system of equations using substitution.
A. x = -4, y = 3; x = -3, y = -4; x = 3, y = -4; x = 4, y = 3
or (-4, 3), (-3, -4), (3, -4), (4, 3)
B. x = -4, y = 3; x = 4, y = 3
or (-4, 3), (4, 3)
C. x = -3, y = -4; x = 3, y = -4
or (-3, -4), (3, -4)
D. x = 9, y = 68; x = 16, y = 243
or (9, 68), (16, 243)
Answer: A
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Find the x- and y-intercepts. Then graph the equation.-5x - 10y = 10
A. (-1, 0); (0, 2)
B. (-2, 0); (0, -1)
C. (-1, 0); (0, -2)
D. (2, 0); (0, -1)
Graph the linear inequality in two variables.x - y > -3
A. 
B. 
C. 
D. 
Solve the radical equation. Check all proposed solutions.
= y + 3
A. y = 6 B. y = 0 C. y = -3 D. y = 3
Solve the problem.
Trains S and T are both traveling in the same direction. Their distances in miles North of Denver after x hours are computed by the functions fS and fT, respectively, and their graphs are shown in the figure for 
(i) How many hours elapse before the two trains are the same distance from Denver? (ii) How far are they from Denver when this occurs?
A. Train S is traveling slower.; 297 hours, 3.3 miles B. Train T is traveling slower.; 297 hours, 3.3 miles C. Train S is traveling slower.; 3.3 hours, 297 miles D. Train T is traveling slower.; 3.3 hours, 297 miles