I'm sorry but the solution you proposed was a bit hard to follow, so I'll just post my solution: we convert "2 and 1/2" to a single fraction:

So, we know that 5/2 gallons cost 60 dollars, which means

To find the cost of a single gallon, we have to solve the equation for g:

#22: 10.2 gallons for $2.59 each = 10.2 x 2.59, which rounded is $26.42.
#23: 12 pieces that are 6.45 in wide each = 12 x 6.45, which is 77.4 in.
#25: Aaron started with $38.
$22.47 + $8.53 + $6.50 is $37.50.
38.00 - 37.50 is .50 or 50 cents.
Hope that helps!
It can have however many x intercepts it wants,
<span>BUT, to be a function it must pass the vertical line test. </span>
<span>this means you have to look at the graph and see if a vertical line drawn anywhere hits the graph more than once. </span>
<span>if it hits it more than once, it is NOT a function.
</span>
An example is a polynomial function to the infinite degree. That is
f(x) = lim (n --> infinity) [ x^n]
but only 1 y intercept (vertical line test remember)
Sn=So(1+p/100*2)
2000*(1+3/100*2)=2000(1+3/50)=2000*53/50=40*53=2120$
My answer:2120$