Garcian decides to sell his extra tomato seedlings at the farmers' market. The cost ot rent a booth at the farmers'
market is $15. Soil, seeds, and containers cost an additional
$42. The equation shows the amount of profit (y) he makes
for selling x tomato plantes.
y = 2.5x - 57
If Garcian makes a profit of $143, how many plants does he
sell?

based on context clues you gave i'm assuming the answer would be c.

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."

you should go to the second answerthey explain it very well, give me a like