Vicki has 210 baseball cards and buys an additional 15 cards every week. jeb has 275 baseball cards and buys an additional 10 cards every week. after how many weeks will vicki and jeb have the same number of baseball cards?

13 weeks

Step-by-step explanation:

X = number of weeks

Vicki = 210 + 15(x)

Jet = 275 + 10(x)

210 + 15(x) = 275 + 10(x)

Find like terms

5x=65

Isolate the variable

5x = 65

5      5          65 divide by 5= 13

*If you need to check substitute 13 for x in the equation and see if it is correct*

is there a question here?

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."