O 91.7 miles
O 55.5 miles
O 41.7 miles
O 63.8 miles

* 55.5 miles

Step-by-step explanation:

17² + b² = 23²

289 + b² = 529

b² = 240

b = 15.491 ≈ 15.5

17 + 23 + 15.5 = 55.5

You can also simply notice B is the only answer with a .5 decimal and thus don't have to add.

1 x=22.52

2: 65/39=604+39x

65x-39x=604

26x=604

x=604/26

×=23.23

the first one is x^2+2x+2

the second one is x^2+4

the last one is x^2-4x+8