The person and the tree both cast shadows. The triangles which form are similar triangles, because the sun is shining from the same angle in the sky. You can write this as a direct proportion. (height : shadow) 5.6 is to 8.1 as what is to 65?
Step-by-step explanation: 45 times 2/3 is 30. So, 30 houses were sold last month. 30 times 1/5 is 6. So, 6 houses were sold this month. Add them together. 30+6=36. Subtract that from 45 and you will get 9. There are 9 houses left to be sold.
