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 = -2, find f(x) when x is 120 min.
A. 254 min
B. 115.8 min
C. 124.2 min
D. 250 min
Answer: D
Mathematics
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Multiply.5x6(-6x + 7)
A. -30x7 + 7 B. -30x + 35 C. -30x7 + 35x6 D. 5x6
Mathematics
Add.8123
A. 131 B. 121 C. 110 D. 120
Mathematics
Use the x-intercepts to find the intervals on which the graph of f is above and below the x-axis.f(x) = 
4(x - 5)3
A. above the x-axis: (5, ?)
below the x-axis: 
, 
B. above the x-axis: 
, (5, ?)
below the x-axis: 
C. above the x-axis: 
, 
below the x-axis: (5, ?)
D. above the x-axis: 
below the x-axis: 
, (5, ?)
Mathematics
Solve.Suppose that a polynomial function is used to model the data shown in the graph below.
For what intervals is the function decreasing?
A. 0 through 10 and 30 through 50 B. 10 through 20 and 30 through 50 C. 10 through 30 D. 0 through 30
Mathematics