Question

Sajia has 30 books in her library she sold 9 books at a thrift store on Saturday write and solve an inquality to determine how many more books she can sell if she comes back on Sunday

Answer 1

see the explanation

Explanation:

Let

x ---->the number of books she can sell if she comes back on Sunday

y ----> the number of books sold on Saturday

we know that

The number of books sold on Saturday plus the number of books she can sell if she comes back on Sunday must be less than or equal to the initial number of books in the library (30 books)

so

The inequality that represent this situation is

`x+y\leq 30`

we have

`y=9\ books`

substitute

`x+9\leq 30`

solve for x

subtract 9 both sides

`x\leq 30-9`

`x\leq 21\ books`

therefore

The maximum number of books she can sell on Sunday is 21