At an animal shelter, there are 5 dogs for every 6 cats. At this rate, how many dogs would there be if there were 18 cats?

What value is a discontinuity of x squared plus 8 x plus 4, all over x squared minus x minus 6?

Which of the following circles have their centers in the third quadrant? check all that apply.

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?