Find the angle between the given vectors. Round to the nearest tenth of a degree.u = 2j, v = 9i - 4j
A. -24°
B. 78.3°
C. 144.3°
D. 114°
Answer: D
Mathematics
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Use implicit differentiation to find dy/dx and d2y/dx2.x2 + y2 = 6
A. 
= - 
; 
= - 
B. 
= 
; 
= 
C. 
= - 
; 
= - 
D. 
= - 
; 
= - 
Mathematics
Fill in the blank with one of the words or phrases listed below. Some words may be used more than once. 
= original price - amount of discount.
A. Total price B. Sales price C. Amount of discount D. Sales tax
Mathematics
Find BA-1.A = 
B = 
A. 
B. 
C. 
D. 
Mathematics
Use identities to simplify the expression. Do not use a calculator.2 cos275° - 1
A. - 
B. 
C. - 
D. 
Mathematics