The costs C and income I for making and selling water bottles with a school logo are given by the equations C = $225 + 2.50n and I = 5n where n is the number of bottles. How many bottles must be bought and sold to break even?

1. 2. ∠b and ∠y are right angles. 3.? 4.? which two statements are missing in steps 3 and 4? ∠x ≅ ∠c △abc ~ △zyx by the sas similarity theorem. ∠b ≅ ∠y △abc ~ △zyx by the sas similarity theorem. = 2 △abc ~ △zyx by the sss similarity theorem. = 2 △abc ~ △zyx by the sss similarity theorem.