Solve the pair of linear equations by addition.
If there is one common solution, select the correct ordered pair of the point of intersection. If there is no one common solution, select either parallel or coincide for the correct answer.
A. 
B. 
C. 
D. The lines are parallel.
E. The lines coincide.
Answer: C
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Solve.A cement pipe has an outside diameter of 
in. and a wall thickness of 
in. What is the inside diameter of the pipe?
Fill in the blank(s) with the appropriate word(s).
As part of a statistics project, a 6th grade teacher brings to class a container with 200 red marbles and 800 white marbles which are thoroughly mixed. To figure out how many marbles in the container are red without actually counting them all, a student randomly draws 150 marbles from the container. Of the 150 marbles drawn, 33 are red.The N-value for this population is
A. 33. B. 1000. C. 200. D. 150. E. none of these
Solve the problem.Rosa averages 26 miles per gallon of gasoline in her car. How far can she travel on 12 gallons of gasoline?
A. 312 miles B. 318 miles C. 38 miles D. 44 miles
Determine if the equations in the given pair are equivalent. Each equation has only one solution.y + 1 = 7 and y = 6
A. Equivalent B. Not equivalent