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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Calculate the circulation of the field F around the closed curve C.F = xy2i + x2yj; curve C is the counterclockwise path around C1 ? C2 : C1: 
0 ? t ? ?C2: r(t) = ti , -7 ? t ? 7
A. 7 B. 0 C. 98 D. 49
Mathematics
Collect like terms and write in descending order.-4x9y10 + 6x9y10 - 5x9y10 + 8x9y10 + 8x9y10
A. 13x9y10 B. Can't be simplified C. 21x9y10 D. -3x9y10
Mathematics
Factor completely. If unfactorable, indicate that the polynomial is prime.x4 + 5x3 + 27x + 135
A. (x + 5)(x3 + 27) B. (x + 5)(x + 3)(x2 - 3x + 9) C. (x + 5)(x - 3)(x2 + 3x + 9) D. prime
Mathematics
Use the commutative and/or associative property of addition and then simplify.1 + (n + 3 + 8)
A. 1n + 11 B. n + 12 C. 12 D. n + 11
Mathematics