Jenny has 50 square tiles. she arranges the towels into a rectangular array of four rows. how many tiles will be left over?

There will be 2 tiles leftover
50/4=12.5 (12 full rows)
4*12=48
50-48=2
Hope this helps!!!

If you multiply the two numbers, you will have 36 + 78i.
*I assumed you had a typo in the first expression, it is generally written as 6 + 3i. If you meant, 6i + 3i, it should have been just 9i.

To find this product, we use the foil method.

(6 + 3i)(10 + 8i)
60 + 48i + 30i + 24i^2
60 + 78i + 24(-1)
34 + 78i