Provide an appropriate response.When using the substitution or elimination method to solve a system of two equations, you end up with an equation stating 0 = 0. What does this indicate to you about the system of equations?
What will be an ideal response?
The system has dependent equations.
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Solve the problem.A square wave is built up from sinusoidal curves of varying periods and amplitudes. Graph the following function, which can be used to approximate the square wave.f(x) = 
0 ? x ? 4 
A better approximation to the square wave is given by f(x) = 
style="vertical-align: -17.0px;" />0 ? x ? 4 
Graph this function and compare the result to the previous graph. Adding another term will improve the approximation even more. Write this new function with four terms.
What will be an ideal response?
Find an equation for the graph.
A. y = 2 cos 
B. y = 4 cos 
C. y = 4 cos (2?x)
D. y = 2 cos (4?x)
Simplify the expression, leaving your answer with only positive exponents. Assume that all variables represent positive numbers.
A. x9/8
B. x1/2
C. 
D. x
Solve the equation.3x3 + 4x2 = 27x + 36
A. 
B. 
C. 
D. 