Solve the system by the method of substitution. Check your solution(s) graphically.
?
?
?
?
A. (3, 6), (1, -2)
B. (5, 5), (1, -2)
C. (6, 3), (-3, 6)
D. (3, 6), (-2, 1)
E. (5, 5), (-2, 1)
Answer: D
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Solve the problem.Find the foci and asymptotes of the following hyperbola:4y2 - 25x2 = 100
A. Foci: (
, 0), (-
, 0); Asymptotes: y = 
x, y = - 
x
B. Foci: (0, 
), (0, -
); Asymptotes: y = 
x, y = - 
x
C. Foci: (
, 0), (-
, 0); Asymptotes: y = 
x, y = - 
x
D. Foci: (0, 
), (0, -
); Asymptotes: y = 
x, y = - 
x
The graph of a logarithmic function is shown. Select the function which matches the graph.
A. y = 1 - log2x B. y = log2x C. y = -log2x D. y = log2(-x)
Evaluate the expression for the given replacement values. Write the answer in simplest form.
for x = 
, y = 
, z = 
A. 
B. 
C. 
D. 
Solve the system by graphing. If there is no solution or an infinite number of solutions, so state. Use set notation to express the solution set.
A. {(-1, -2)} B. no solution; ? C. {(-2, -1)} D. {(1, 2)}