Solve the problem.Roberto invested some money at 7%, and then invested $4000 more than twice this amount at 11%. His total annual income from the two investments was $4790. How much was invested at 11%?
A. $30,000
B. $34,000
C. $12,000
D. $3400
Answer: B
Mathematics
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Find the general equation of the orthogonal trajectories of the curves for the given equations.The exponential curves y = ce3x
A. 3y2 = c - 2x B. 3y2 = c + x2 C. 3y2 = c - x2 D. 3y2 = c + 2x
Mathematics
Convert to rectangular coordinates.
A. (-6
, 6
)
B. (6
, -6
)
C. (6
, 6
)
D. (-6
, -6
)
Mathematics
Determine the quadrant containing ?.tan ? > 0 and csc ? < 0
A. I B. II C. III D. IV
Mathematics
Solve the problem.Find the value for x in the following special right triangle. Use exact values. 
3 m
A. 6
m
B. 
m
C. 6 m
D. 3
m
Mathematics