Find the exact value of the expression.sin 260° cos 20° - cos 260° sin 20°
A. - 
B. - 
C. 
D. 
Answer: A
Mathematics
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Add the integers.-17 + (-46) + 61 + (-31)
A. -33 B. 1 C. 29 D. -155
Mathematics
Suppose that a nonlinear system is composed of equations whose graphs are those described, and the number of points of intersection of the two graphs is as given. Make a sketch satisfying these conditions.A circle and an ellipse; two points
What will be an ideal response?
Mathematics
Perform the indicated operation.(9x - 5y)(9x + 5y)
A. 81x2 - 25y2 B. 81x2 + 90xy - 25y2 C. 81x2 + 25y2 D. 81x2 - 90xy - 25y2
Mathematics
Multiply mentally.90 ? 4
A. 356 B. 94 C. 360 D. 364
Mathematics