Use the RTSC Approach to solve the application.Elaine was cooking dinner for some friends. She went out to do the shopping and spent $84. She spent twice as much on food as on drinks. How much did she spend on each?
A. Drinks: $42; food: $84
B. Drinks: $21; food: $42
C. Drinks: $28; food: $56
D. Drinks: $21; food: $63
Answer: C
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Find f so that F = ?f. If the fuction is not conservative state so.F(x, y, z) = (y - z)i + (x + 2y - z)j - (x + y)k
A. f(x, y, z) = xy + y2 - x - y + C B. f(x, y, z) = xy + y2 - xz - yz + C C. f(x, y, z) = x(y + y2) - xz - yz + C D. f(x, y, z) = x + y2 - xz - yz + C
Solve the problem.For the study described below, identify the sample.A researcher is interested in the level of stress among emergency-room nurses in the U.S. 275 emergency-room nurses were interviewed to determine their level of stress. Each nurse was assigned a stress rating based on his or her answers to a number of questions. The average stress rating for the 275 nurses was determined.
A. The 275 emergency-room nurses interviewed B. The average stress rating for the 275 emergency-room nurses interviewed C. All emergency-room nurses in the U.S. D. The questionnaire given to the 275 emergency-room nurses interviewed
Find the equation of the axis of symmetry.f(x) = -7(x - 5)2 - 8
A. x = -5 B. x = -7 C. x = -8 D. x = 5
Find the unknown number in the proportion. Write your answer as a whole number or a mixed number if possible.
= 
A. x = 4
B. x = 4
C. x = 
D. x = 5