Yesterday, nancy's lunch cost $9.80, and she left a $1.47 tip. today, nancy's lunch cost $12.60. if she tips at the same rate that she did yesterday, how much of a tip should nancy leave? can you solve it? !

The difference between tax advoidance and tax evasion

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

Proving the congruent supplements theorem