Solve.- 
? 
< 
A. 
B. 
C. 
D. 
Answer: C
Mathematics
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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}
Mathematics
Find the inverse of the function.f(x) = -6 - 7x
A. f-1(x) = - 
- 
B. f-1(x) = 1 - x
C. f-1(x) = - 
+ 
D. f-1(x) = 
- 
Mathematics
Determine the specific solutions (if any) to the equation on the interval [0, 2?).2 cos2? + sin ? - 2 = 0
A. 
, 
B. 0, ?, 
, 
C. 
, 
, 
, 
D. 
, 
Mathematics
Find the derivative of y with respect to x, t, or ?, as appropriate.y = x6ln x - 
x3
A. x6ln x - x2 + 6x5 B. 7x5 - x2 C. x5 - x2 + 6x5ln x D. 6x5 - x2
Mathematics