What can be said about ?A , ?C , and ?ABC?
(a) each equals 70°
(b) they sum to 360°
(c) congruent
(d) no relationship
(c) congruent
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Find the area of the specified region.Inside the cardioid r = ?(1 + sin ?), ? > 0
A. 
B. 
+ 2?2
C. 2??
D. 
- 2?2
For the given matrix A, find a basis for the corresponding eigenspace for the given eigenvalue.A = 
, ? = 7
A. 
B. 
C. 
D. 
Solve.x4 - 46x2 + 45 = 0
A. ±2, ±3
B. ±1, ±3
C. ±1, ±3
D. ±1, ±
Write an algebraic equation and use it to solve the problem.The Four Flying Feldmans acrobat troupe is planning a nationwide tour. They will give 8 performances per week in various cities across the U.S. The venues in which they will perform hold about 9000 people each, and concert tickets will sell for $18 each. The advance expenses for each performance are $23,000, and the additional travel, lodging, meal, and miscellaneous costs are $35,000 per week. How many weeks will the Four Flying Feldmans need to be on tour if each of them wants to earn $10,770,000 from the tour?
A. 8 weeks B. 14 weeks C. 40 weeks D. 10 weeks