Answer:
9x + 9y
Step-by-step explanation:
Joan has red and pink hibiscus in groups of 9. She has x groups of red hibiscus and y groups of pink hibiscus.
She has x groups of red hibiscus. Red hibiscus in groups of 9. its x groups of 9 that is 9x.
She has y groups of pink hibiscus. Pink hibiscus in groups of 9. its y groups of 9 that is 9y.
the total number of hibiscus= x groups of 9 + y groups of 9
the total number of hibiscus= 9x + 9y
