Emily; s family drove 254.6 miles. their car used 19 gallons of gasoline. describe the car's gas mileage.

You take your miles driven divided by the gallons of gas used.

So,

254.6 miles/19 gallons = 13.4

The gas mileage of the car is 13.4

Hope this helps :D

first, you divide the triangle in two, tô form a retangle triangle. after, using pythagoream theorem:

18^2 = 14^2 + (x/2)^2

(x^2/4) + 196 = 324

x^2/4 = 324 - 196

x^2/4 = 128

x^2 = 512

x = √512

x = √2^9

x = 16√2 cm

i hope i you.