PLEASE HELP ILL MARK BRALIEST!! There are 25 animals in the barn. Some are cows and some are ducks. There are 80 legs in
all.
a. Write and solve a system of equations to determine how many of each type of
animals there are.
b. What does the solution to the system of equations represent in the context of the
problem? Explain.

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?