Solve and graph the solution set on a number line.
< 7
A. [-7, 7]
B. (-7, 7)
C. (-?, -7] ? [7, ?)
D. (-?, -7) ? (7, ?)
Answer: B
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Solve the problem using Gaussian elimination.Three machines together produce 170 parts each hour. Twice the production of the second machine is 
more than the sum of the production of the other two machines. If the first machine operates for 
and the others operate for 9 hours, 
are produced. Find the production rate of each machine.
A. 60 parts/h, 30 parts/h, 80 parts/h B. 60 parts/h, 80 parts/h, 30 parts/h C. 80 parts/h, 60 parts/h, 30 parts/h D. 30 parts/h, 60 parts/h, 80 parts/h
Solve the given differential equation.4y" - 20y' + 25y = 0
A. y = c1e5x/2 + c2 B. y = ce5x/2 C. y = (c1 + c2x)e-5x/2 D. y = (c1 + c2x)e5x/2
Write the rational number as a decimal and state whether the decimal is repeating or terminating.
A. 0.2
repeating
B. 0.
repeating
C. 0.1
repeating
D. 0.
repeating
Write the first n terms of the given arithmetic sequence (the value of n is indicated in the question).a1 = 2 - 
, a2 = 2, n = 4
A. 0, 0 - 
, 3 - 3
, 4 - 4
B. 2 - 
, 3 - 
,4 - 
, 5 - 
C. 0, 2 - 
, 2, 2 + 
D. 2 - 
, 2, 2 + 
, 2 + 2