Will mark brainliest if right

It doesn't specify so . . .

If its the bottom right it's 90°

If it's the bottom left it's 48°

Step-by-step explanation:

Ok so first, the triangle is a right triangle

meaning there's  a 90° angle

Great, We now know two angles

90° and 42°

All angles of a triangle add up to 180

so we make it into an equation

and solve it.

42 + 90 + 6x = 180

132 + 6x = 180

-132         -132

6x  = 48

Divide by 6 to leave x by itself.

x = 8

Now we can see what 6x actually is

6 ( 8 ) = 48

Note: This is for the bottom left angle. 6x

1760 kilometers

step-by-step explanation:

multiply the amount of time the plane took to travel by it's speed