Simplify. Assume that all variables represent any real number.
A. 
B. x
C. -x
D. -
Answer: B
Mathematics
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Solve.A number increased by seven is negative twelve. What is the number?
A. -19 B. 19 C. -5 D. 7
Mathematics
Solve the equation.x + 17 = 0
A. i
B. -i
C. -17
D. 17
Mathematics
Solve the problem.In a school survey, students showed these preferences for instructional materials. Answer the question. 
About how many students would you expect to prefer computers in a school of 850 students?
A. About 170 students B. About 36 students C. About 306 students D. About 153 students
Mathematics
Express as a sum of logarithms.ln 0.9b
A. ln 0.9 - ln b B. ln 0.9 + ln b C. ln(0.9 + b) D. ln 9 - ln b
Mathematics