Write a chain rule formula for the following derivative.
for w = f(p, q); p = g(x, y), q = h(x, y)
A. 
= 
+ 
B. 
= 
C. 
= 
+ 
D. 
= 
+ 
Answer: C
Mathematics
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Find the least common denominator. 
and 
A. (r + 4 B. r(r + 4)(r - 2) C. (r + 4)(r - 2) D. r - 2
Mathematics
If AB ? BC, DC ? BC , AB and CD in the figure, prove that ?BAC ? ?CBD.
Mathematics
Solve the right triangle using the information given. Round answers to two decimal places, if necessary. 
b = 2, B = 20°; Find a, c, and A.
A. a = 5.49 c = 5.84 A = 80° B. a = 5.49 c = 6.84 A = 80° C. a = 5.49 c = 5.84 A = 70° D. a = 5.49 c = 6.84 A = 70°
Mathematics
Find the real solutions, if any, of the equation. Use the quadratic formula.4x2 + x - 1 = 0
A. 
B. 
C. 
D. no real solution
Mathematics