3 Answered Questions for the topic Math Quiz

Math Quiz

01/22/15

which of the following is true? help ASAP
a.) 2+7+12+...+(5n-4)=5n(n-1)/2   b.)2+7+12+...+(5n-2)=5n(n-1)/2 c.)2+7+12+...+(5n-1)=n(5n-1)/2 d.)2+7+12+...+(5n-3)=n(5n-1)2
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Math Quiz

01/16/15

A collection of marbles is set up into 5 rows. The first row has 125 marbles, and each row after that one has 4 less marbles than the preceding row.
How many total marbles are there in the 3rd row? a.)115 b.)120 c.)113 d.)117
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Math Quiz

01/16/15

Given the first four terms and the number of terms of the geometric series,find the finite sum. -2-6-18-54-...,n=9
a.)-11,682 b.)-21,682 c.)-19,682 d.)-19,569 help URGENT!!!!
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