Yes is equivalent because 12 x 4 is 48 and 5x5 is 25
Algebra 1 is a high school course. You learn some of the same things but in algebra it's more complicated.
You take $22,000.00 + $625.00= 22,625.00 (which is the sales tax)
Take $22,625.00 x .06=$1,357.50
Then take $22,625.00 + $<span>1,357.50 +$40.00 = $24.022.50</span>
Do you mean a_(n+1), worded a sub (n+1)?
If so yes. If the function of the sequence is getting smaller or more negative with each term.