Solve the system of equations by the substitution method. Check your solutions. For any dependent equations, write your answer in ordered pair form.
A. {(3, 9)}
B. {(3, 8)}
C. {(2, 8)}
D. {(2, 9)}
Answer: B
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Find the domain and range.f(x) = 
A. Domain: All real numbers; range: All real numbers except 0 B. Domain: All real numbers except 15; Range: All real numbers C. Domain: All real numbers except 15; range: All real numbers except 0 D. Domain: All real numbers; Range: All real numbers
Solve the problem.On our moon, the acceleration of gravity is 1.6 m/sec2. If a rock is dropped into a crevasse, how fast will it be going just before it hits bottom 45 seconds later?
A. -36 m/sec B. -72 m/sec C. 72 m/sec D. 3240 m/sec
Solve the problem.A box contains 4 slips of paper, on each of which is written the number 1, 2, 3, or 4, respectively. A slip is drawn, and the number on it is noted. That slip is put aside, and another slip is drawn and the number on it noted. What is the probability thata) the sum of the two numbers is 5?b) the first number drawn is a 2 and the second number is not 5?c) the sum of the two numbers is not 10?
A. a) 
b) 
c) 0
B. a) 
b) 
c) 1
C. a) 
b) 
c) 0
D. a) 
b) 
c) 1
Solve the differential equation: 
What will be an ideal response?