Graph the system of inequalities.y ? -x2y ? x + 1y ? -5x ? -4
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Write the expression with only positive exponents and evaluate if possible. Assume all variables represent nonzero real numbers.- 
A. 
y + 
x + 
B. 
y + 
x - 
C. 
y - 
x - 
D. 
y - 
x + 
Mathematics
Find the standard deviation. Round to one more place than the data.5, 4, 6, 20, 5, 13, 12, 17, 14
A. 6.3 B. 1.3 C. 5.5 D. 5.9
Mathematics
Use the graph to complete the identity.
= ? 
A. sin x - 5 B. cos x - 3 C. cos x + 3 D. sin x + 5cos x
Mathematics
Use Cramer's rule to solve the system of equations. If D = 0, use another method to determine the solution set.2x + 8y + 8z = 24x + 4y + 4z = -4x + y + z = -6
A. Cramer's rule does not apply since D = 0; ? B. {(-6, -1, 5)} C. {(-1, 5, -6)} D. Cramer's rule does not apply since D = 0; {(2z-1, z + 2, z)}
Mathematics