Decide whether the graph of the equation opens up, down, to the left, or to the right; and whether it is wider, narrower, or the same shape as the graph of 
(or 
).f(x) = -x2 - 10x - 14
A. Down; same
B. Up; narrower
C. Up; same
D. Down; narrower
Answer: A
Mathematics
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Find the sum Sn of the first n terms of the geometric sequence. 3, -9, 27, -81, 243, . . . ; n = 10
A. -44,279 B. -44,286 C. -44,292 D. -44,288
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Evaluate the expression according to the replacement value given.7p - r; replace p with 3 and r with 6.
A. 21 B. 15 C. 27 D. 126
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Decide which of the 5 properties of a commutative group (closure, identity, inverse, associative, commutative) hold for the given system.
A. Closure, identity, associative, and commutative only B. Closure, identity, inverse, and commutative only C. Closure, identity, inverse, and associative only D. All of them
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Find the exact value of the expression.tan 870°
A. - 
B. 
C. 1
D. - 
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