Vince is saving for a new mobile phone. The least expensive model Vince likes costs $225.90. Vince has saved $122.35. He used this solution to determine how much more he needs to save. 225.90 less-than-or-equal-to 122.35 a. 225.90 minus 122.35 less-than-or-equal-to 122.35 minus 122.35 a. 103.55 less-than-or-equal-to a. Vince says that based on the solution, he should save a maximum of $103.55. Is Vince correct

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

you would have to sell 24 bracelets.

step-by-step explanation:

84/3.5 = 24