Solve the linear system by using an inverse matrix.
A. {(-1, 3)}
B. {(3, -1)}
C. {(-3, 1)}
D. {(1, -3)}
Answer: D
Mathematics
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Find the missing parts of the triangle. Round to the nearest tenth when necessary or to the nearest minute as appropriate.B = 63°30'a = 12.2 ftc = 7.8 ft
A. b = 12.2 ft, A = 75°07', C = 41°23' B. No triangle satisfies the given conditions. C. b = 11.2 ft, A = 77°49', C = 38°41' D. b = 13.2 ft, A = 73°07', C = 37°23'
Mathematics
Use the even-odd identities to find the exact value of the expression. cos 
A. 0 B. undefined C. -1 D. 1
Mathematics
Find the indefinite integral and check the result by differentiation.
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A. 
B. 
C. 
D. 
E. 
Mathematics
Express the phrase as a ratio in lowest terms.9 yards to 5 feet
A. 
B. 
C. 
D. 
Mathematics