?Use the following matrices to perform the indicated matrix operations, if possible.
?
?
, 
?
A. ?
B. ?
C. ?
D. ?
E. ?
Answer: C
Mathematics
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Determine the amplitude and find the phase shift in radians (to the nearest tenth).y = 2 sin x - 9 cos x
A. 
, 0.2
B. 170, 0.2
C. 170, -0.2
D. 
, -0.2
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Use a commutative property to complete the statement. Do not simplify.7 + 2 = 
A. 2 + 7 B. 2 - 7 C. 7 - 2 D. 7 ? 2
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Determine an estimate of the exact answer. Use estimation by rounding.Estimate the floor area of a classroom that measures 701 feet long and 361 feet wide by rounding each measurement to the nearest ten.
A. 252,000 square feet B. 253,061 square feet C. 1.94 square feet D. 1760 square feet
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Use the quadratic formula to solve the equation.x2 + 7x + 3 = 0
A. 
B. 
C. 
D. 
Mathematics