Solve the system by substitution. If the system is inconsistent or dependent, say so.y = xx = -y
A. infinite number of solutions of the equation y = x; dependent system
B. (1, -1)
C. (0, 0)
D. empty set solution; inconsistent system
Answer: C
Mathematics
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Express as a single logarithm and, if possible, simplify.logb x7 - 2logb 
A. logb x8
B. 
C. logb (x7 - x)
D. logb x6
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Find the number of years to the nearest tenth of a year.
A. 9.9 yr B. 11.9 yr C. 7.9 yr D. 14.9 yr
Mathematics
Find the product.6ax6(-11ax6 + 8x4)
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Mathematics