Arrange the systems of equations in order from least to greatest based on the number of solutions for each system. -51 + y = 10
-25% + 5y = 50
3x – 7y = 9
-4r + 5y = 1
y = 61 – 2
y = 63 - 4

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