Solve by the substitution method.x + y = 9x + y = 4
A. (9, 4)
B. No solution
C. (0, 13)
D. (0, 0)
Answer: B
Mathematics
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Solve the problem.How many different three-digit numbers can be written using digits from the set {2, 3, 4, 5, 6} without any repeating digits?
A. 20 three-digit numbers B. 10 three-digit numbers C. 120 three-digit numbers D. 60 three-digit numbers
Mathematics
Solve the quadratic equation by the method of your choice.2x2 - 22 = 0
A. {-
, 
}
B. {-
, 
}
C. {
}
D. 
Mathematics
A plane lamina with constant density (p(x,y) = 6 occupies a region in the xy-plane bounded by a simple closed path C. Its moments of inertia about the axes are  figures 4.png)
Find the moments of inertia about the axes, if C is a rectangle with vertices (0, 0), (4, 0), (4, 5) and (0, 5) .
Mathematics
Multiply.(x + 
)(x - 
)
A. x2 - 
B. x2 + 9x - 6
C. x2 - 9x - 6
D. x2 - 9
Mathematics