Determine the appropriate rotation formulas to use so that the new equation contains no xy-term.x2 + 2xy + y2 - 8x + 8y = 0
A. x = 
(x' - y') and y = 
(x' + y')
B. x = -y' and y = x'
C. x = 
x' - 
y' and y = 
x' + 
y'
D. x = 
x' - 
y' and y = 
x' + 
y'
Answer: A
Mathematics
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Simplify.
5
A. 
B. 
C. 
D. 
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Four players (A, B, C, and D) agree to divide the 15 items shown below by lining them up in order and using the method of markers. The players' bids are as indicated.
Item 5
A. goes to A. B. goes to B. C. goes to C. D. goes to D. E. is left over.
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Solve.The speed limit is 80 miles per hour. Convert this to kilometers per hour. Round answer to the nearest hundredth, if necessary.
A. 128.8 km per hr B. 203.2 km per hr C. 49.6 km per hr D. 24 km per hr
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Identify the number as prime or composite.119
A. Prime B. Composite
Mathematics