Solve the problem.Suppose  is a mathematical model for actual time as a function of estimated time, where f(x) represents actual time and x represents estimated time and m and b are constants. If  and b = -0.3, find f(x) when x is 120 min.

A. 95.7 min
B. 120.24 min
C. 119.76 min
D. 96.3 min


Answer: A

Mathematics

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A. w = 5, x = -4, y = 0, z = 3 B. w = 5, x = -2, y = 6, z = -3 C. w = -5, x = -6, y = 12, z = 3 D. w = -2, x = 4, y = 7, z = 1

Mathematics

Simplify the expression.[25 - (4 + 6) ÷ 2] - [1 + 21 ÷ 3]

A. 7 B. 19 C. 12 D. 9

Mathematics

Perform the indicated operations and simplify the result. Leave the answer in factored form. ? 

A.  
B.
C.  
D.  

Mathematics

Solve the system by substitution. -4x + 8y = 56 x + 7y = 49

A. No solution B. (0, 7) C. (1, 6) D. (-7, 0)

Mathematics