Which number sentence could be used to solve this problem?

A ball of yarn was cut up into 45 strips that each measure 6 inches long. How much yarn was in the ball to begin with?

45 + 6 = y

45 – 6 = y

45 ÷ 6 = y

45 × 6 = y

Need on this geometry question. explain how you did it.

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!

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?