Y=-3x+4 find the missing value

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The interior angles formed by the side of a hexagon have measures of them up to 720° what is the measure of angle a

What is the sum of the geometric series in which a1 = 7, r = 3, and an = 1,701? hint: cap s sub n equals start fraction a sub one left parenthesis one minus r to the power of n end power right parenthesis over one minus r end fraction comma r ≠ 1, where a1 is the first term and r is the common ratio