Y=x^2, estimate the x values when y=5

2.2361

Step-by-step explanation:

You would have to find x squared = 5, and x would square root of 5, which is around 2.2360679775, and I rounded to 2.2361

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.