Find the LCD for the given fractions.
and 
A. 4
B. 56
C. 180
D. 720
Answer: C
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Write a chain rule formula for the following derivative.
for w = f(x, y, z); x = g(r, s), y = h(t), z = k(r, s, t)
A. 
= 
B. 
= 
+ 
C. 
= 
+ 
D. 
= 
+ 
Provide an appropriate response.Solve the system for x and y, expressing either value in terms of a or b, if necessary. Assume that a ? 0 and b ? 0. 
A. 
B. 
C. 
D. 
Use the Pythagorean Theorem to find the length of the missing side.Then find the indicated trigonometric function of the given angle. Give an exact answer with a rational denominator.Find sin ?.
A. 
B. 
C. 
D. 
Solve the following system by any appropriate method. If there is no real number solution, so state.x2 + y2 = 81y = x - 9
A. (9, 0), (0, -9) B. (-9, 0), (9, 0), (0, -9), (0, 9) C. (-9, 0), (0, 9) D. no real solution