In what percentage of such groups (of 400) would 290 or fewer improve? Round your answer to one decimal place.

This question awards 100 ! i really don’t want to fail i will also mark you !

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.

Which radical expression is a rational number? a. √ 360 b. √ 644 c. √ 225 d. √ 122