Solve the system by the method of your choice. Identify systems with no solution and systems with infinitely many solutions, using set notation to express their solution sets.y = 
x + 6x - 2y = -12
A. {(0, 6)}
B. {(-12, 0)}
C. {(x, y)|x - 2y = -12}
D. ?
Answer: C
Mathematics
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Express the number in scientific notation.0.0000004
A. 4 × 10-6 B. 4 × 10-8 C. 4 × 10-7 D. 4 × 10-9
Mathematics
Perform the indicated operation.-99 ÷ (-9)
A. 
B. -11
C. 11
D. 1
Mathematics
Find the slope of the line containing the given points.f(-5.7) = 5.9 and f(-12.6) = -17.2
A. 
B. - 
C. - 
D. 
Mathematics
Express the graph shown using interval notation. Also express it as an inequality involving x.
A. (1, 9) 1 < x < 9 B. [1, 9] 1 ? x ? 9 C. (1, 9] 1 < x ? 9 D. [1, 9) 1 ? x < 9
Mathematics