Aubree invests money in an account paying simple interest. She invests $30 and no money is added or removed from the investment. After one year, she has $32.40. What is the simple percent interest per year?

walter needs to make at least 5 more cookies but no more than 40. 5 ≤ x ≤ 40

step-by-step explanation:

20 ≤ x + 15 ≤ 55

subtract 15 from all parts

20-15 ≤ x + 15-15 ≤ 55-15

5 ≤ x ≤ 40

this means how many more cookies he has to make

walter needs to make at least 5 more cookies, but no more than 40 cookies; 5 ≤ x ≤ 40

she made 48 + y = a cookies.     not enough info is given to find the total.

what are your