Find the exact value of the expression.cos 
sin 
- cos 
sin 
A. 
B. 
C. 
D. 1
Answer: C
Mathematics
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Solve the exponential equation.
?
?
A. 
B. 
C. 
D. 
E. 
Mathematics
Use the Gauss-Jordan method to solve the system of equations. If the system has infinitely many solutions, let the last variable be the arbitrary variable.-3x - y - 8z = -64 4x + 9z = 74 8y + z = 14
A. {(5, 1, 6)} B. ? C. {(-5, 1, 10)} D. {(5, 6, 1)}
Mathematics
Solve the exponential equation. Use a calculator to approximate the solution to the nearest thousandth.9x = 4x + 6
A. x ? 10.257 B. x ? 2.321 C. x ? 3.243 D. x ? 5.168
Mathematics
Calculate the mean of the set. Round to the nearest tenth, if necessary.81 lbs 93 lbs 65 lbs 89 lbs 62 lbs
A. 65 lbs B. 78 lbs C. 93 lbs D. 81 lbs
Mathematics