Determine the appropriate rotation formulas to use so that the new equation contains no xy-term.10x2 - 4xy + 6y2 - 8x + 8y = 0
A. x = 
(x' - y') and y = 
(x' + y')
B. x = 
x' - 
y' and y = 
x' + 
y'
C. x = 
x' - 
y' and y = 
x' + 
y'
D. x = -y' and y = x'
Answer: C
Mathematics
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.
A. 
B. 
C. 
D. 
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(3a2b/4ac2)/(6ab2/2bc) =
a. c-1/4 b. ab-2/4 c. a2bc-1/4 d. 18a3bc-3/8 e. 18ac-1/8
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Write the fraction in simplest form. Assume that all variable factors in the denominator are not equal to zero.
A. 
B. 
C. 
D. 
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Use the distributive property to rewrite the algebraic expression without parentheses. Then simplify the result, if possible.7(x - 8)
A. 7x - 15 B. 7x - 56 C. 7x - 8 D. 7x + 56
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