Identify the equation without applying a rotation of axes.2x2 + 6xy + 9y2 + 2x - 3y + 1 = 0
A. ellipse
B. hyperbola
C. parabola
D. not a conic
Answer: A
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Simplify the expansion.(2 × 107) + (2 × 106) + (9 × 102) + (8 × 100)
A. 22,000,098 B. 4,000,908 C. 22,000,908 D. 22,000,980
Name the property illustrated by the statement.(5 + 5) + 1 = (5 + 5) + 1
A. associative property of addition B. distributive property C. additive inverse property D. commutative property of addition
Express the indicated roots of unity in standard form a + bi.Fifth roots of unity
A. 1 + 0i
cos 
+ i sin 
? 0.31 + 0.95 i
cos 
+ i sin 
? - 0.81 + 0.59 i
cos 
+ i sin 
? - 0.81 - 0.59 i
cos 
+ i sin 
? 0.31 - 0.95 i
0 + i
B. 1 + 0i
cos 
+ i sin 
? 0.81 + 0.59 i
cos 
+ i sin 
? 0.31 + 0.95 i
cos 
+ i sin 
? - 0.31 + 0.95 i
cos 
+ i sin 
? - 0.81 + 0.59 i
C. cos 
+ i sin 
? 0.31 + 0.95 i
cos 
+ i sin 
? - 0.81 + 0.59 i
cos 
+ i sin 
? - 0.81 - 0.59 i
cos 
+ i sin 
? 0.31 - 0.95 i
cos 
+ i sin 
? 0.31 + 0.95 i
D. 1 + 0i
cos 
+ i sin 
? 0.31 + 0.95 i
cos 
+ i sin 
? - 0.81 + 0.59 i
cos 
+ i sin 
? - 0.81 - 0.59 i
cos 
+ i sin 
? 0.31 - 0.95 i
Solve the problem.On a buying trip in Los Angeles, Rosaria Perez ordered 120 pieces of jewelry: a number of bracelets at $5 each and a number of necklaces at $7 each. She wrote a check for $720 to pay for the order. How many bracelets and how many necklaces did Rosaria purchase?
A. 65 bracelets and 55 necklaces B. 55 bracelets and 65 necklaces C. 70 bracelets and 50 necklaces D. 60 bracelets and 60 necklaces