Verify that the values of the variables listed are solutions of the system of equations.
x = 6, y = 2
A. not a solution
B. solution
Answer: B
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Solve the problem.A conservation officer needs to know the width of a river in order to set instruments correctly for a study of pollutants in the river. From point A, the conservation officer walks 100 feet downstream and sights point B on the opposite bank to determine that ? = 30° (see figure). How wide is the river (round to the nearest foot)? 
A. 50 ft B. 58 ft C. 173 ft D. 115 ft
Solve.
= 
A. 5
B. 
C. - 9
D. -3
Solve.(x2 - 5)2 - 10(x2 - 5) + 16 = 0
A. ±
, ±
B. ±
, ±
C. ±
D. 
, 
Solve the problem.The position of an object moving in a straight line is given by 
where s is in meters and t is the time in seconds the object has been in motion. How far will an object move in 17 seconds?
A. 867 m B. 493 m C. 1411 m D. 51 m