Answer:
Step-by-step explanation:
Y=1/2x - 5/2
Equation: 6x=3x+72
So 3x=72
x=24

$\angle GFH=\angle FBD=\angle ABC=144$
Answer:
67
Step-by-step explanation:
First multiply, then do addition and subtraction in order from left to right
Answer:
5.264 * 10^4
Step-by-step explanation:
We put a decimal point to the right of the number, so
52640.
Then we move it to the left until we get a number that is between 1 and 10.
5.2640
This was four hops to the left.
We can remove the trailing 0, and write
5.264 * 10^4
10^4 because of the four hops
A line perpendicular to the two parallel lines would create 8 right angles.