If a set of polygons forms a tessellation in the plane, then
(a) they cover the plane with no gaps.
(b) they are all congruent polygons.
(c) none of the regions overlap.
(d) Both (a ) and (c) are correct.
(e) Both (a ) and (b) are correct.
d
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Multiply and write the answer in lowest terms.
? 
A. 
B. 
C. 
D. 
Find the exact value of the expression.sin (tan-1 2)
A. 2
B. 
C. 
D. 5
Write the first six terms of the sequence beginning with the given term. Then calculate the first and second differences of the sequence. State whether the sequence has a linear model, a quadratic model, or neither. ? a0 = 1 an = an - 1 + n ?
A. 0, 1, 2, -4, 7, -11First differences: 1, 1, 2, 3, 4Second differences: -1, 1, -1, 1Neither B. 1, -2, 4, -7, 11, -16First differences: -1, 1, -1, 1Second differences: 1, 2, 3, 4, 5Neither C. 0, 1, 2, 4, 7, 11First differences: 1, 1, 2, 3, 4Second differences: -1, 1, -1, 1Linear D. 0, 1, 2, 4, 7, 11First differences: 1, 1, 2, 3, 4Second differences: -1, 1, -1, 1Quadratic E. 1, 2, 4, 7, 11, 16First differences: 1, 2, 3, 4, 5Second differences: 1, 1, 1, 1Quadratic
Evaluate. Assume u > 0 when ln u appears. 
A. - e1/t3 + C
B. - 
+ C
C. 
+ C
D. - 
+ C