Provide an appropriate response.List the different lengths between pairs of nails on a 4-nail by 4-nail geoboard. The vertical and horizontal distance between any two adjacent nails is one unit. ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
A. 1, 2, 3, ,
,
,
, 2
,
, 3
B. 1, 2, 3, 5, ,
,
, 2
, 3
C. 1, 2, 3, ,
,
, 2
,
, 3
D. 1, 2, 3, 4, ,
, 2
,
,
, 3
Answer: C
Mathematics
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Find a formula for an ?for the arithmetic sequence. ? a1 = -5, a5 = 18 ?
A. an ?= n-
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C. an ?= - 43n
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