Find the exact value of the expression.sin 260° cos 20° - cos 260° sin 20°
A. - 
B. - 
C. 
D. - 
Answer: B
Mathematics
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Substitute the given values into the formula and then evaluate to find the unknown quantity. Label units in your answer. If the answer is not exact, round your answer to the nearest hundredth.Find the perimeter of a rectangle if the length, L, is 7 meters and the width, W, is 8 meters. Use the formula P = 2L + 2W.
A. 15 m B. 22 m C. 112 m D. 30 m
Mathematics
Provide an appropriate response.Why is the slope of a vertical line undefined?
What will be an ideal response?
Mathematics
Determine whether the following pairs of equations represent parallel lines, perpendicular lines, or neither of these.
?
?
A. parallel lines B. perpendicular lines C. neither
Mathematics
Add or subtract. Simplify the answer.4 - 
A. 
B. 
C. - 
D. 
Mathematics