Use an appropriate identity to find the exact value of the expression.sin (285°)
A. - 
B. 
C. 
D. - 
Answer: D
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Find all the first order partial derivatives for the following function.f(x, y, z) = cos x sin2 yz
A. 
= -sin x sin2 yz; 
= z cos x sin yz cos yz; 
= y cos x sin yz cos yz
B. 
= -sin x sin2 yz; 
= 2z cos x sin yz cos yz ; 
= 2y cos x sin yz cos yz
C. 
= sin x sin2 yz; 
= -2z cos x sin yz cos yz; 
= - 2y cos x sin yz cos yz
D. 
= sin x sin2 yz; 
= - cos x sin yz cos yz; 
= -cos x sin yz cos yz
Plot the point in the rectangular coordinate system.(1.5, -6.5)
A. 
B. 
C. 
D. 
Factor the trinomial, or state that the trinomial is prime. Check your factorization using FOIL multiplication.x2 - x - 56
A. (x + 8)(x - 7) B. (x + 1)(x - 56) C. (x + 7)(x - 8) D. prime
Provide an appropriate response.A welder can make 8 welds in an hour. How many welds can 26 welders make in a 40-hour week if all work at the same rate?
A. 74 B. 130 C. 5,260 D. 8,320 E. none of the above