Find the length of side a.
Can you help me please?

6

Step-by-step explanation:

Use Pythagorean theorem:

a²+b²=c²

8²+a²=10²

64+a²=100

subtract 64 from 100

a²=36

√a=√36

a= 6

Fraction division is basically multiplication of a reciprocal.

For example (1/4)/(1/8) = (1/4)x(8/1)=2

Multiplication of the answer and the piece that divides (in this case 2 x 1/8), you should get the piece that is being divided (in this case 1/4). If that is correct, then your division is correct.