Find the area of the specified region.Inside the circle r = 
sin ? and outside the cardioid r = 1 + cos ?
A. 
B. 
C. 
D. 
Answer: C
Mathematics
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Factor the sum or difference of two cubes.729y3 - 343
A. (9y - 7)(81y2 + 49) B. (729y - 7)(y2 + 63y + 49) C. (9y + 7)(81y2 - 63y + 49) D. (9y - 7)(81y2 + 63y + 49)
Mathematics
Tell if the square root is rational, irrational, or not a real number. If the square root is rational, find the exact value; if the square root is irrational, write the approximate value rounded to two decimal places.
A. irrational; 
B. rational; 
C. rational; 
D. not a real number
Mathematics
Use the given information to find the exact value of the trigonometric function.cos ? = - 
; sin ? > 0
Find cos 
.
A. 
B. 
C. - 
D. - 
Mathematics
Write the system of linear equations that the augmented matrix represents.
A.
| 20x | + 19y | = 17 |
| 11x | + 19y | = 17 |
B.
| 20x | + 19y | = 17 |
| 19x | + 11y | = 17 |
C.
| 19x | + 20y | = 17 |
| 19x | + 11y | = 17 |
D.
| 20x | + 19y | = -17 |
| 19x | + 11y | = -17 |
Mathematics