70 degrees. All angles in a triangle must add up to 180 degrees so you add up angles you do know and subtract that from 180 then you get 70 and since opposite angles are equal that would make angle x 70 degrees aswell
Well let's say x = -1000
That's what I would do
Here are the rates of the trains:
(n represents train A's speed)
A: n
B: n + 10
We know it is 5 hours, and total distance, so:
5(n) + 5(n + 10) = 1250
5n + 5n + 50 = 1250
10n = 1200
Divide:
n = 120
One train goes 120, the other goes 130
First, simplify and combine like terms.
5x+4<4x+5
Subtract 4x from each side
x+4<5
Then, subtract 4 from both sides. Then you get the final answer
x<1
hope this helped!