Solve the equation.0.21(x + 20) + 0.34(x + 30) = -13.1. (Round to the nearest whole number, if necessary.)
A. {-10}
B. {10}
C. {50}
D. {-50}
Answer: D
Mathematics
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Find the surface area or volume.Use numerical integration with a programmable calculator or a CAS to find, to two decimal places, the area of the surface generated by revolving the curve 
about the x-axis.
A. 7.21 B. 9.29 C. 1.48 D. 14.42
Mathematics
Change to a percent.
A. 3
%
B. 33
%
C. 
%
D. 
%
Mathematics
Factor completely.18x2 - 78x - 60
A. (18x + 12)(x - 5) B. 6(3x - 2)(x + 5) C. (3x + 2)(6x - 30) D. 6(3x + 2)(x - 5)
Mathematics
List all the subsets of the set given.{ }
A. {?} B. no subsets C. { }, {0} D. { }
Mathematics