Solve the system by the addition method.9x - 7y = -61-3x - 2y = 16
A. {(-6, 2)}
B. {(-7, 2)}
C. {(-6, 1)}
D. ?
Answer: C
Mathematics
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Find a vector function that represents the curve of intersection of the two surfaces: the top half of the ellipsoid x²+5y²+5z²=25 and the parabolic cylinder y=x².
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Mathematics
Solve the equation by factoring.x2 - x = 72
A. {-8, -9} B. {8, 9} C. {8, -9} D. {-8, 9}
Mathematics
Express the number in scientific notation.0.000000831012
A. 8.31012 × 10-6 B. 8.31012 × 10-7 C. 8.31012 × 106 D. 8.31012 × 107
Mathematics
Divide and simplify.
÷ 
A. - 
B. 
C. 
D. 
Mathematics