Let x be the length of the third side.
Thus:

Step-by-step explanation:
An a quadratic equation,

If the quadratic has one solution,
then

So plug in 27 for c, and 3 for a




or

So our answer is 18 or -18
20 dogs are at the shelter.
Answer:
8.2
Step-by-step explanation:
If each student in the group collected 15 shells, we know that there are 123 students on the field trip, so we can take 123 and divide it by 15 to get 8.2 or 41/5.
The slope of the line is 
First, you must find 2 points.
(-6,8) (-2,5)
Then, you must substitute the value of the points in.

Finally, simplify the fraction.
