Use the Pythagorean theorem to find the length of the unknown side of the right triangle. Express your answer as a simplified radical.
A. 9
B. 9
C. 3
D. 3
Answer: D
Mathematics
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Find the directrices of the hyperbola.49x2 - 576y2 = 28,224
A. y = ± 
B. x = ± 
C. x = ± 
D. y = ± 
Mathematics
Determine the size of the matrix.
A. 1 × 3 B. 3 × 1 C. 3 D. 1
Mathematics
Write the improper fraction as a mixed number or a whole number.
A. 
B. 6
C. 
D. 
Mathematics
Write the rate as a fraction in simplest form.A large vehicle travels 279 miles on 72 gallons.
A. 
B. 
C. 
D. 
Mathematics