Solve the system using the addition method. If the system is inconsistent and has no solution, state this. If the system is dependent, write the form of the solution for any real number x.0.9x + 0.2y = 4.2 x - 0.1y = 3.7
A. ?
B. (4, 3)
C. (3, 4)
D. (0.4, 0.3)
Answer: B
Mathematics
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A. $1.00 B. $0.00 C. $0.08 D. $0.09
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Find the standard form of the equation of the parabola with the given characteristic and vertex at the origin. directrix: x=-5 ?
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Indicate what must be done to each side of the equation in order to isolate the variable.
x = 8
A. Multiply by 9
B. Multiply by - 
C. Divide by 8
D. Multiply by 
Mathematics