First estimate the answer. Then add or subtract to find the exact answer. Write answer as a mixed number.
A. Estimate: 10; Exact: 
B. Estimate: 11; Exact: 
C. Estimate: 10; Exact: 
D. Estimate: 11; Exact: 
Answer: D
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Use the properties of parallel lines to solve the problem.In the figure, 
. Identify any pairs of congruent angles. 
A. ?ABC and ?ADE, ?ACB and ?AED B. ?ABC and ?ACB, ?ADE and ?AED C. ?ABC and ?ACB, ?DBC and ?ECB D. ?ABC and ?ADE, ?ACB and ?BAC
Solve the system of equations by graphing. If the system is inconsistent or the equations are dependent, say so.3x - 2y = 53x + 2y = 13
A. ? (inconsistent system) B. {(3, 2)} C. {(2, 3)} D. {(3, 4)}
Let 
and 
and find
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?
A. 
B. 
C. 
D. 
E. 
Model the curve with a sine function.
?
?
?
Note that the period of the curve is 
and its range is 
. Write the model function as a function of x and ?.
What will be an ideal response?