Solve the equation.
= x + 6
A. {-4, -3}
B. {-4}
C. {4}
D. {-4, 4}
Answer: B
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A. 82 B. 76 C. 38 D. 32
Solve the problem.The temperature at 4 p.m. on January 22 was -10° Fahrenheit. By 9 p.m. the temperature had risen 24 degrees. Find the temperature at 9 p.m.
A. 14° B. -34° C. -14° D. 34°
Use the given row transformation to change the matrix as indicated.
; -6 times row 3 added to row 1
A. 
B. 
C. 
D. 
Solve the problem.Julie and Eric row their boat (at a constant speed) 16 miles downstream for 2 hours, helped by the current. Rowing at the same rate, the trip back against the current takes 8 hours. Find the rate of the current.
A. 5 mph B. 2.5 mph C. 4 mph D. 3 mph