Use the cofunction identities to evaluate the expression without using a calculator.
?
sin225° + sin265°
?
A. -1
B. -2
C. 1
D. 2
E. 3
Answer: C
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Find the x-intercepts of the polynomial function. State whether the graph crosses the x-axis, or touches the x-axis and turns around, at each intercept. f(x) = -x2(x + 6)(x2 - 1)
A. 0, touches the x-axis and turns around; 6, crosses the x-axis; -1, touches the x-axis and turns around; 1, touches the x-axis and turns around B. 0, crosses the x-axis; -6, crosses the x-axis; -1, crosses the x-axis; 1, crosses the x-axis C. 0, touches the x-axis and turns around; -6, crosses the x-axis; -1, crosses the x-axis; 1, crosses the x-axis D. 0, touches the x-axis and turns around; -6, crosses the x-axis; 1, touches the x-axis and turns around
Determine the solution to the system of inequalities.y ? 2x - 2y > 2x
A. 
B. 
C. 
D. 
Subtract. Write the answer in lowest terms as a mixed number.
A. 5
B. 5
C. 4
D. 6
Determine two functions, designated by y1 and y2, such that their union will give the graph of the given equation.x2 + 10x + y2 + 6y = 45
A. y1 = -3 + 
and y2 = -3 - 
B. y1 = -3 - x + 
and y2 = -3 - x + 
C. y1 = -3 + 
and y2 = -3 - 
D. y1 = 3 + 
and y2 = 3 - 