Solve the system by substitution.7x - 6y = 77x + 6y = 7
A. ?
B. 
C. 
D. 
Answer: B
Mathematics
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Convert the units.18,000 pounds = 
tons
A. 10
B. 8
C. 9
D. 9
Mathematics
Solve the problem.Find the length, L, of the lake. Assume that the two triangles are similar. 
A. 4900 m B. 210 m C. 350 m D. 23.3 m
Mathematics
Write the rational expression in lowest terms.
A. 
B. 
C. 
D. 
Mathematics
Write a negation for the statement.x > 69
A. x ? 69 B. x < -69 C. x = 69 D. x < 69
Mathematics