Perform the indicated operation.(2.9b - 10) - (9.4b - 7)

A. 12.3b - 17
B. -65b - 3
C. 6.5b + 3
D. -6.5b - 3


Answer: D

Mathematics

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Find the mean of the list of data.17, 19, 21, 21, 19, 17 

A. 20 B. 18 C. 21 D. 22 E. 19

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Provide an appropriate response.Let f(x) =  x2 + 3x + 1 and g(x) = -2.(a)Find: (f ? g)(x)(b)Find: (g ? f)(x)

Fill in the blank(s) with the appropriate word(s).

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Use Gaussian elimination and matrices to solve the system of linear equations. Write your final augmented matrix in triangular form and then solve for each variable using back substitution.x - y + 4z=164x + z= 5x + 5y + z=25

A. (0, 4, 5) B. (5, 4, 0) C. (0, 5, 4) D. (5, 0, 4)

Mathematics

Factor the difference of two squares.343x2 - 112

A. 7(7x - 4)2 B. 7(7x + 4)(7x - 4) C. 14(7x + 4)(7x - 4) D. 7(7x + 4)2

Mathematics