Find the mean. If necessary, round to one decimal place.77, 44, 77, 96, 44
A. 67.1
B. 84.5
C. 67.6
D. 68.1
Answer: C
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Find both the parametric and the vector equation of the line.The line through (0, 1, 0) in the direction of the vector v = (3, 0, -1)
A. x = 3, y = t, z = -1; r = (3, 0, -1) + t(0, 1, 0) B. x = 3, y = t, z = -1; r = (0, 1, 0) + t(3, 0, -1) C. x = 3t, y = 1, z = -t; r = (0, 1, 0) + t(3, 0, -1) D. x = 3t, y = 1, z = -t; r = (3, 0, -1) + t(0, 1, 0)
Transform the equation to a form without an xy-term by a rotation of axes and then identify the curve.3x2 + 4xy = 36
A. 
+ 
= 1; ellipse
B. 
- 
= 1; hyperbola
C. 
- 
= 1; hyperbola
D. 
- 
= 1; hyperbola
Tell which brand is the better buy.Brand X 20 oz for $2.80Brand Y 15 oz for $1.95
A. Equal value B. Not enough information C. Brand Y D. Brand X
Solve the problem.An art teacher knows that for a price of $20 per student, she can enroll 40 students in her pottery class. However, for each decrease of $2 in the price, she can expect 10 more students. What price will maximize her revenue from the class?
A. $26 B. $8 C. $14 D. $17