Rebecca had 9/10 of a yard of ribbon. then she gave 7/20 of a yard to a friend. how much does she have left? explain your work

rewrite fraction s to have common denominator:

9/10 = 18/20

 now subtract:

18/20 - 7/20 = 11/20 left

yards

Step-by-step explanation:

By considering the given information , we have

The total initial length of ribbon = yards

The length of ribbon she gave to her friend = yards

The length of ribbon she has left = Initial length - Length she gave

[Multiply 2 on numerator and denominator to the first fraction to make both fractions like.]

hence, the length of ribbon she has left = yards

7,24

step-by-step explanation:

x² + 11x + 18 < 0  

[-11 ± sqrt(121 - 72)]/2 = (-11 ± 7)/2  

solution: (-9, -2)

step-by-step explanation: