Solve the system by the substitution method.
A. 
B. 
C. 
D. 
Answer: C
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Simplify.2.1x - 3.8 - 1.7x - 9.6
A. 0.4x + 5.8 B. -13x C. 0.4x - 13.4 D. 3.8x - 36.48
Solve the problem.Find an equation for the horizontal tangent to the curve at P.
A. y = 
B. y = 
C. y = 0
D. y = 1
Use the data set {d1, d2, d3, ..., d255} consisting of 255 numbers to answer the following question(s).After sorting the data set (in increasing order from left to right), the median is
A. the sum of all the numbers divided by 255. B. the average of the numbers in the 127th and 128th positions. C. the number in the 127th position. D. the number in the 128th position. E. none of these
Express the sum using summation notation. Use a lower limit of summation not necessarily 1 and k for the index of summation.
+ 
+ 
+ 
+ . . . + 
A. 
B. 
C. 
D. 