28 batteries for smoke alarm. Store sells them in 6 packs. Using skip counting how many packs should be bought?

What ia the sum if the first 7 terms of the geometric series

If f(x) = 3x-2 and g(x) =2x+1 find (f-g)(x)

Two farmers pay a total rent of $140 for a pasture. the first farmer placed $4 oxen in the pasture, and the second farmer placed $30 sheep in the pasture. the farmers split the rent based on the proportion of the pasture eaten by their own animals that month. how much should the first farmer pay, if 1 ox eats as much as 10 sheep in a month?