Write a polynomial in two variables that describes the total area of the shaded region. Express the polynomial as the sum or difference of terms. 4x + 5y
A. 4x2 + 20xy + 5y2
B. 4x2 + 9xy + 5y2
C. 4x2 + 4xy + 5y2
D. 4x2 + 5y2
Answer: B
Mathematics
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Use the properties of logarithms to simplify the expression.ln (x2 - 81) - ln (x + 9)
A. ln (x + 9) B. ln (x2 - 9) C. ln (x - 81) D. ln (x - 9)
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Find the probability.A bag contains 19 balls numbered 1 through 19. What is the probability of selecting a ball that has an even number?
A. 9
B. 
C. 
D. 
Mathematics
Find the volume of the solid. 
A. 36 cu in. B. 6 cu in. C. 11 cu in. D. 108 cu in.
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Fill in the blank with one of the words or phrases listed below. 
The 
of a polyhedron is the sum of the areas of the faces of the polyhedrons.
A. surface area B. perimeter C. area D. volume
Mathematics