What is the solution to this system of equations? 3x + y = 17 x + 2y = 49 it has no solution. it has infinite solutions. it has a single solution: x = 15, y = 17. it has a single solution: x = -3, y = 26.

hello from mrbilldoesmath!

answer:

a(n) - a(n-1) -3

discussion:

this ones a bit interesting. given a(n) = 5 - 3n consider this:

a(n-1) = 5 - 3(n-1)

          = (5 - 3n) + 3             => but a(n) = 5 - 3n, the first term

          = a(n)   + 3                 => subtract 3 from both sides

a(n-1) -3 = a(n)  

or

a(n) - a(n-1) -3

you,

mrb

answer

you start with $5 and save $10 a week until you have at least $45wer

step-by-step explanation: