You multiply fractions simply by multiplying numerators and denominators with each other:

Answer:
$140 is the new price
Step-by-step explanation:
let the other leg be x cm.
(5)^2+(x)^2=(12)
25+(x)^2=144
(x)^2=144-25
x=√119
x=10.9
This is an equilateral triangle, which means all the sides are the same length. So, the answer is 35. ☺♥
Hope this helps.