Change the word phrase to an algebraic expression. Use x as the variable to represent the number.a number increased by six
A. 6x
B. x + 6
C. 6
D. x - 6
Answer: B
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In order to determine how American undergraduate college students feel about eliminating spring break in order to finish spring term a week early, a survey was conducted. Two hundred undergraduate students from the University of Miami (FL) were interviewed. Both of the interviewers hired to conduct the survey were told to interview 25 freshmen, 25 sophomores, 25 juniors, and 25 seniors. Of the 200 students interviewed, 20% were in favor of the elimination of spring break, 70% were opposed, and 10% had no opinion.The sampling method used for the survey is called
A. random sampling. B. simple random sampling. C. quota sampling. D. stratified sampling. E. none of these
Evaluate the expression, if possible.
A. 4 B. not a real number C. -64 D. -4
Graph the system of inequalities. Indicate the solution by shading.2x + 3y ? 6 x - y ? 3 y ? 2
A. 
B. 
C. 
D. 
Perform the multiplication.
A. 52.8 B. 313.9 C. 312.8 D. 312.91