Respuesta :

hollymakesanentrance

Answer:

B: 7.5

Step-by-step explanation:

Use the formula a²+b²=c² to calculate. a=x b=13 c=15. Simply plug in the numbers to the coresponding letters

a²+13²=15²

a²+169 = 225

   -169    -169

__________

      a²= -56

a = 7.5

noraclair

Answer:

b

Step-by-step explanation:

so we now a and b are the legs let's say a=13 and b=x/? we also have c=15 which is the hypotenuse. let's get started.

a²+b²=c²

13²+x²=15²

169+x²=225

225-169=56

x²=56

so we square root both of them.

x=7.5 rounded