Gabby and sydney bought some pens and pencils. gabby bought 4 pens and 5 pencils for 6.71. sydney bought 5 pens and 3 pencils for 7.12. find the cost of each.

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.