Solve by graphing. Label the axes and show where the solution is located on the graph.Suppose y = mx + b is a mathematical model for actual time as a function of estimated time, where y represents actual time and x represents estimated time and m and b are constants. If m = 1.8 and b = -0.3, find y when x is 30 min.
A. 30.54 min
B. 53.7 min
C. 29.46 min
D. 54.3 min
Answer: B
Mathematics
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Find the derivative of y.y = 2t3 tanh 
A. 6t2 tanh 
- 4 sech2 
B. 6t2 tanh 
- 2 sech2 
C. 6t2 tanh 
- 4 sech 
D. 6t2 tanh 
+ 4 sech2 
Mathematics
Provide an appropriate response.Write using the letter i, simplifying if possible: 
A. -6i B. 6i C. -18i D. 18i
Mathematics
Simplify the rational expressions.
A. 
B. 
C. 
D. 
Mathematics
Translate the problem to a system of equations and then solve.Andy has 16 coins made up of quarters and half dollars, and their total value is $4.75. How many quarters does he have?
A. 3 quarters B. 13 quarters C. 18 quarters D. 5 quarters
Mathematics