Ryan gave the following justification that 2x^2+10x+6=(x+3)(2x+1)+3(x+1) is an identity. Is Ryan correct? choose the correct answer. A. Ryan is incorrect. He made a mistake in step 4.

Ryan is correct.

Ryan is incorrect. He made a mistake in step 3.

Ryan is incorrect. He made a mistake in step

15 and 14.7 are 1 apart, so 15 – 14.7 must be 1.

Are the corresponding angles congruent? explain why or why not.

Statements reasons 1. ab ? cd; ad ? bc 1. given 2. ac ? ac 2. reflexive property 3. ? adc ? ? cba 3. ? 4. ? dac ? ? bca; ? acd ? ? cab 4. cpctc 5. ? dac and ? bca are alt. int. ? s; ? acd and ? cab are alt. int. ? s 5. definition of alternate interior angles 6. ab ? cd; ad ? bc 6. converse of the alternate interior angles theorem 7. abcd is a parallelogram 7. definition of parallelogram what is the missing reason in step 3?