Shane covered a 10 ft. by 14 ft. wall with wall paper. To match the pattern,
he bought 20% extra. Each roll of
paper covers 30 ft
How many rolls of wall paper did
Shane buy?

step-by-step explanation:

answer: (1,3) (3,-1) (5,-5) ?

step-by-step explanation:

b

step-by-step explanation:

there is only one way to arrange all the eight relative to each other because they are not distinct. we have

now there are nine places to place an (and not more than one in one place).   because we have four symbols, we need to choose four of these nine places to insert an . order does not matter because the are not distinct.

thus there are 1 · c(9,4) ways, or, if we calculate it,

thus there are 126 ways to form such "words."