Factor completely. State that the polynomial is prime if it cannot be factored.x2 - 18xy + 81y2
A. (x - 9y)(x + 9y)
B. (x - 9y)2
C. prime
D. (x + 9y)2
Answer: B
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Find the distance between the planes.
 Figure 3.png)
Provide an appropriate response.Use the law of sines to solve the triangle ABC if a = 19, c = 15, and C = 105°. If there are two possibilities, find both solutions. Round sides to four significant digits and angles to the nearest 0.1°.
A. A = 49.7°, B = 25.3°, b = 8.406 B. A = 133.0°, B = 47.0°, b = 6.714 C. A = 133.0°, B = 47.0°, b = 6.714; A = 49.7°, B = 25.3°, b = 8.406 D. no solution
Determine whether the pair of vectors is orthogonal.
, 
A. Yes B. No
Provide an appropriate response.A 20-year loan for $100,000 is to be amortized by equal semiannual payments. If interest is at the nominal rate of 10% compounded semiannually, find (a) the semiannual payment; (b) the interest in the first payment; (c) the principal repaid in the first payment.
What will be an ideal response?