[2] When the summer is over, Billy goes back to school with the money saved from question 1.b. While at school, Billy takes the same amount of money every week from
his savings. After 10 weeks his sayings were down to $1,640.
a) How much money will remain in Billy's savings after 24 weeks?
b) After how many weeks will all of Billy's savings be gone?

fourth month

step-by-step explanation:

it is the one with the most keychains.

step-by-step explanation:

assume that y=mx+n

you may see as , where

in we change places of numerator and denominator, then we insert an opposite sign

and substitute m=-1/3 in the equation y=mx+n

point (4,2), so we substitute x=4, y=2 to the equation and calculate

the answer is

let me get back to you on this one.

step-by-step explanation: