<em>13 Degrees Celsius, or 55.4 degrees Fahrenheit. </em>
<em>-2 + 15 = 13. To find your answer in Fahrenheit, just do (Celsius here) x 9/5 + 32.</em>
Step-by-step explanation:
![{b}^{2} = {16}^{2} + {12}^{2} \\ {b}^{2} = 256 + 144 \\ b = 20](https://tex.z-dn.net/?f=%20%7Bb%7D%5E%7B2%7D%20%20%3D%20%20%7B16%7D%5E%7B2%7D%20%20%2B%20%20%7B12%7D%5E%7B2%7D%20%20%5C%5C%20%20%7Bb%7D%5E%7B2%7D%20%20%3D%20256%20%20%2B%20144%20%5C%5C%20b%20%3D%2020)
If you only want to simplify the problem, you would use the distributive property. 9k * 7k = 63
![k^{2}](https://tex.z-dn.net/?f=%20k%5E%7B2%7D%20)
. Then, 9k * 4 = 36k. However, if you wanted to solve for k, you would want to set the equation equal to 0. This gives you 63
![k^{2}](https://tex.z-dn.net/?f=%20k%5E%7B2%7D)
+ 36k = 0. After factoring, k = 0 or -4/7.