Use Cramer's rule to solve the system. If D = 0, use another method to complete the solution. 3x + 5y - 2w = -13 2x + 7z - w = -1 4y + 3z + 3w = 1 -x + 2y + 4z = -5
A. 
B. 
C. 
D. {(1, -2, 0, 3)}
Answer: D
Mathematics
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Set up an integral for the length of the curve.x = y2 + 7y, 0 ? y ? 7
A. 
B. 
C. 
D. 
Mathematics
Solve.In the land of Taxalot, the function T(x) = 0.21(x - 8300) + 740 represents the tax bill T of a single person whose adjusted gross income is x dollars for incomes between 8300 and 29,900 inclusive. What is a single filer's tax bill if adjusted gross income if their tax bill is $3785?
A. $23,300 B. $22,400 C. $23,400 D. $22,800
Mathematics
Find the quotient 
of the complex numbers. Leave answer in polar form.z1 = 8
z2 = 3
A. 
B. 
C. 
D. 
Mathematics
Factor the difference of squares. If the polynomial cannot be factored, write "prime."r2 - 81s2
A. (r - 9s)(r + 9s) B. (r2 - 9s)(r2 + 9s) C. prime D. (r - 9s)(r - 9s)
Mathematics