Explanation:
first you have to find the lcm of 42 and 33
=462
then you're going to take the lcm and subtract the price of the vase from the lcm
=>462-40
=422
then now you're going to take the answer and divide it by the cost of each rose
=>422 ÷ $2
=211 roses at Weston Florist
then you're going to do the same for Harper's flowers
=>462-30
=432
=>432÷3
=144 roses at Harper's Flowers