Answer: The ratio of roses to tulips will not change and remains the same.
Step-by-step explanation:
Given : In a florist shop, the ratio of roses to tulips is 7:2. The shop has 84 tulips on Friday morning.
Let x be the number of roses and y be the number of tulips .
Then, as per given , we have

If the florist uses half of each type of flower to fill an order for a wedding, then the required ratio of roses to tulips will be

Hence, the ratio of roses to tulips will not change and remains the same.