Abouquet had 10 flowers and sold for $90 how much would a bouqet of 5 flowers cost?

First, you would need to figure out how much a single flower would cost. To do this, you would divide $90 among the 10 flowers. 
$90 ÷ 10 = $9

A single flower would cost $9. 

Now, all you would have to do is multiply the cost per flower by the number of flowers.
$9 × 5 = $45

I would cost $45 for a bouquet of 5 flowers. 

I hope this helps!