100/6 = 16.66 rounds to 16.7
Answer:
Each flower cost an equivalent of $5 per flower. To get this answer you have to divide 90 by 18 to get the average cost of the flowers and stuff.
It seems like you've begun to apply the grouping method.
Because the two binomials in the parentheses are the same, we can rewrite this as
(5ab-4)(x+6)
(x+6) cannot be further factored. (5ab-4) cannot be further factored either.
Final answer: (5ab-4)(x+6)