Question

Solve for x.
9 km
12 km
X

Answer 1

15km

Explanation:

`\rm \mapsto \: {9}^(2) + {12}^(2) = {x}^(2) \\ \rm \mapsto \: {x}^(2) = 81 + 144 \\ \rm \mapsto \: {x }^(2) = 225 \\ \rm \mapsto \: x = √(225) \\ \rm \mapsto \: x = 15`