Find the area of the region that lies inside the first curve and outside the second curve. Select the correct answer.
 multiple choice.png)
A = ?
Mathematics
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Factor completely the polynomial. Indicate any that are not factorable using integers.a 2 - 4a + 21
A. (a - 3)(a + 7) B. (a + 3)(a - 7) C. (a - 3)(a - 7) D. (a + 3)(a + 7) E. not factorable
Mathematics
Find the equation of the directrix of the conic.
 FIGURE 1.png)
Mathematics
For which positive integers k is the series  FIGURE 1.png)
convergent?
What will be an ideal response?
Mathematics
Determine whether the equation is linear or nonlinear.
x + 4 = 0
A. linear B. nonlinear
Mathematics