Solve the system by substitution, if possible.
?
?
A. (?4, 3)
B. ?(16, 14)
C. ??(- 4, - 3)
D. ?(-11, 106)
E. ?(- 16, - 14)
Answer: A
Mathematics
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Evaluate the integral by making a substitution and then using a table of integrals.
A. 
+ 
ln 
+ C
B. 
+ 
sin-1 
+ C
C. 
sin-1 
+ C
D. 
+ 
ln 
+ C
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Solve the equation. Use the multiplication axiom.9a = -81
A. {90} B. {-90} C. {1} D. {-9}
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Find the angle between vectors v and w. Round the answer to the nearest tenth of a degree.v = -i + 4j, w = 2i - 3j
A. 160.3° B. 63.4° C. 70.3° D. 0.9°
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Solve the triangle. Round lengths to the nearest tenth and angle measures to the nearest degree.A = 21°B = 20°a = 13.8
A. C = 140°, b = 25.3, c = 13.2 B. C = 140°, b = 13.2, c = 25.3 C. C = 139°, b = 25.3, c = 13.2 D. C = 139°, b = 13.2, c = 25.3
Mathematics