Solve the problem.If h(x) = 
2, find all values of x for which h(x) = 
.
A. -6, 5
B. -10, 12
C. -12, 10
D. -5, 6
Answer: D
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Use counting rules to determine the probability.A tourist in France wants to visit 8 different cities. If the route is randomly selected, what is the probability that she will visit the cities in alphabetical order?
A. 
B. 
C. 
D. 40,320
Solve the problem.If the temperature in the city has risen 3° each day, how much has it risen in 4 days?
A. 7° B. 22° C. 15° D. 12°
Find the focus and directrix of the parabola with the given equation.- 
x2 = y
A. focus: (-4, 0) directrix: x = 2 B. focus: (0, -2) directrix: y = -2 C. focus: (0, -2) directrix: y = 2 D. focus: (0, 2) directrix: y = -2
Solve the system of equations using matrices. Use Gaussian elimination with back-substitution.x - y + 4z=205x + z= 4x + 3y + z=-8
A. {(0, 4, -4)} B. {(4, -4, 0)} C. {(0, -4, 4)} D. {(4, 0, -4)}