Factor the expression completely, if possible.49x2 - 36y2
A. (7x - 6y)2
B. (7x + 6)(7x - 6)
C. (7x + 6y)(7x - 6y)
D. (7x + 6y)2
Answer: C
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Find 
by using the Chain Rule. Express your final answer in terms of t.w = x + tan-1(xy), x = t + 4, y = 4t2
A. 1 + 
B. 1 - 
C. 1 + 
D. 
Solve the problem.The data below represent the average monthly cost of natural gas in an Oregon home. 
Above is the graph of 47.35 sin x. Make a scatter diagram of the data. Find the sinusoidal function of the form 
which fits the data.
What will be an ideal response?
Decide whether the ordered pair is a solution of the given system.
A. No B. Yes
Write the system as a vector equation or matrix equation as indicated.Write the following system as a matrix equation involving the product of a matrix and a vector on the left side and a vector on the right side. 2x1 + x2 - 6x3 = -66x1 - 4x2= 2
A. 
= 
B. 
= 
C. 
= 
D. 
= 