The feet of ribbon Rosa left when she has 15 yards of ribbon and used 8 feet of ribbon to tie gift bags, is 7 feet.
What is the subtraction?
Subtraction is the resultant number which is obtained by reducing a number with another. Let a number a is subtracted with the another number b. Then the subtraction of these two number will be,
[tex]D=a- b[/tex]
Here, (a, b) are the real numbers.
Rosa has 15 yards of ribbon. She uses 8 feet of ribbon to tie gift bags. Let suppose she has left n feet of ribbon. Thus,
[tex]n=15-8\\n=7[/tex]
Thus, the feet of ribbon Rosa left when she has 15 yards of ribbon and used 8 feet of ribbon to tie gift bags, is 7 feet.
Learn more about the subtraction here;
https://brainly.com/question/17301989
#SPJ1