Write the algebraic rule to describe the translation p(-8,6)_p(-10,2)

Find the vertex of the function given below y=x^2-6x+1

Atriangle has a side lengths of 18cm, 80 cm and 81cm. classify it as acute obtuse or right?

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?