Solve the system using Cramer's Rule. If D = 0, use another method to complete the solution.0.9x + 0.4y = 2.9 x - 0.9y = -3.5
A. ?
B. {(5, 1)}
C. {(1, 5)}
D. {(0.1, 0.5)}
Answer: C
Mathematics
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Find the solution to the quadratic equation, if they exist.
2x²+4x+7= 0
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Solve the problem.An auditorium has 15 rows with 10 seats in the first row, 12 in the second row, 14 in the third row, and so on. How many seats are in the auditorium?
A. 255 seats B. 390 seats C. 360 seats D. 300 seats
Mathematics
Simplify.
A. 
B. 
C. 
D. 
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Graph the level curves in the first octant at heights of 
and 
for the given equation.5x + 3y + z = 30 
A. 
B. 
C. 
D. 
Mathematics