Jack goes to a store and selects 2 pairs of jeans for $34.99 each, 3
shirts for $16.50 each and 4 pair of
socks for $3.75 each. He has a
gift card for $125. How much
more will he need to buy this
(before paying tax)?

For questions like this just multiply the prices by how many they're buying and add all the numbers up and subtract by how much they have to begin with.

Example:

$34.99×2=$69.98

$16.50×3=$49.50

$3.75×4=$15

$69.98+$49.50+$15=$134.48

$134.48-$125=$9.48

(n^3 - n)

= n(n-1)(n+1)

since it is divisible by 3 and 2 ,because it is a multiple 3 consecutive number

if, n-1 is odd then n+1 is also odd, then it is a multiple of 9

but if, n-1 is even then n+1 is also even, then it is a multiple of 4

so, largest multiple = max(9*2, 4*3) = max(18, 12) = 18

it has the same slope and a different y-intercept

hope this : )