Solve.If you double a number and then add 42, you get 
of the original number. What is the original number?
A. -5
B. -30
C. -29
D. 31
Answer: B
Mathematics
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Solve the system of equations by using elimination by addition.
A. (1, 1) B. Inconsistent C. (1, 0) D. (0, 1)
Mathematics
Solve the compound inequality. Write the solution set using interval notation and graph it.4x - 10 ? 18 and 2x - 1 ? 13
A. (-?, 7)
B. (7, ?)
C. {7}
D. [7, ?)
Mathematics
Solve the system of equations using Gaussian elimination or Gauss-Jordan elimination.-2x + 9y = -13-4x + 18y = -15
A. (2, -1) B. (2, 5) C. (-13, 5) D. No solution
Mathematics
Write the positive or negative number for the following.They hiked 108 feet below sea level.
A. -108 B. +108
Mathematics