Doing Corrections
Please comment the answer thank you

What are the solutions of the system? solve by graphing. y = -x^2 - 3x + 2 y = -2x + 2

What unit of been sure would be appropriate for the volume of a sphere with a radius of 2 meters

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?