Multiply the polynomials using the special product formulas. Express the answer as a single polynomial in standard form.(4x + 7y)(4x - 7y)
A. 8x2 - 14y2
B. 16x2 + 56xy - 49y2
C. 16x2 - 56xy - 49y2
D. 16x2 - 49y2
Answer: D
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Find the domain and range and describe the level curves for the function f(x,y).f(x, y) = 4x + 6y
A. Domain: all points in the xy-plane; range: all real numbers; level curves: lines 
c > 0
B. Domain: all points in the xy-plane; range: real numbers z ? 0 ; level curves: lines 
c ? 0
C. Domain: all points in the xy-plane; range: real numbers z ? 0; level curves: lines 
c ? 0
D. Domain: all points in the xy-plane; range: all real numbers; level curves: lines 
Provide an appropriate response.To graph 
on a graphics calculator, we must consider the union of the graphs of the two functions. 
and 
. Using the graph of 
, explain (a) how the solution set of 
can be determined graphically
and (b) how it relates to the domain of the hyperbola.
What will be an ideal response?
Graph the function, then find the extreme values of the function on the interval and indicate where they occur.y = 
- 
on the interval -? < x < ?
A. 
Absolute maximum is: 6, on the interval [6, ?); absolute minimum is: -6 on the interval (-?,1]
B. 
Absolute maximum is: 7, on the interval [6, ?); absolute minimum is: -7 on the interval (-?, 1]
C. 
Absolute maximum is: 8, on the interval [6, ?); absolute minimum is: -8 on the interval (-?,1]
D. 
Absolute maximum is: 7, on the interval [7, ?); absolute minimum is: -7 on the interval (-?,0]
Make a line graph of the data.The following table gives the average cost of producing a music video over the given years. Use time on the horizontal scale for your line graph.
What will be an ideal response?