Simplify the expression.
?
Fill in the blank(s) with the appropriate word(s).
Answer: 4
Mathematics
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Solve the problem.In the following formula, y is the minimum number of hours of studying required to attain a test score of x: 
How many hours of study are needed to score 89?
A. 4.1 hr B. 100.90 hr C. 41.00 hr D. 7.16 hr
Mathematics
Graph the hyperbola.
- 
= 1
A. 
B. 
C. 
D. 
Mathematics
Find the unknown side of the right triangle. Use a calculator or square root table when necessary and round to the nearest thousandth.
6 cm
A. 45 cm B. 22.5 cm C. 6.708 cm D. 4.5 cm
Mathematics
Factor.9x2 + 12xy + 4y2
A. (3x - 2y)2 B. (3x + 2y)(3x - 2y) C. (9x + y)(x + 4y) D. (3x + 2y)2
Mathematics