Simplify.
- 
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Simplify.13 - (-9)2
A. 68 B. 31 C. -68 D. 94
Mathematics
Find the mean of the set of data. Round your answer to the nearest tenth.228, 221, 211, 211, 211, 211, 221, 215, 215, 215, 221, 221
A. 217.6 B. 216.4 C. 216.9 D. 216.8
Mathematics
Simplify.
A. not a real number B. 5 C. 4 D. 8
Mathematics
Graph the quadratic function using its vertex, axis of symmetry, and intercepts.f(x) = x2 - 6x
A. vertex (3, 9)
intercept (0, 18)
B. vertex (3, -9)
intercepts (0, 0), (6, 0)
C. vertex (-3, -9)
intercepts (0, 0), (-6, 0)
D. vertex (-3, 9)
intercept (0, 18)
Mathematics