Solve for n in the proportion. If possible, first simplify the known fraction.
= 
A. n = 5
B. n = 3
C. n = 4
D. n = 2
Answer: D
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What will be an ideal response?
Special products can be illustrated by using areas of rectangles. Use the figure to justify the special product 
Give the monomial that represents the sum of the areas of the gray rectangles.
A. 2ab B. b2 C. ab D. a2
Solve using any appropriate method. If the system has an infinite number of solutions, use set-builder notation to write the solution set. If the system has no solution, state this.9x + 4y = -738x + 3y = -66
A. (-9, 2) B. (-18, 4) C. (9, 2) D. No solution
If the sides of a rectangular solid are as shown, and 
, determine the angle, ?, between the diagonal of the base of the solid and the diagonal of the solid. Round answer to two decimal places.
A. 21.91o B. 24.09o C. 17.21o D. 26.28o E. 19.86o