Answer:
13
Step-by-step explanation:
Use PEMDAS
1. 5-4=1
7-3=4
Now you have the equation: (2x1 + 6x4)/2
2. 2x1=2
6x4=24
Now you have the equation (2+24)/2
3. 2+24= 26
4. 26/2=13
So your answer is 13.
Make sense?
Parallel line will have the same slope....so B is ur answer
Answer: 
Step-by-step explanation:
Using Pythagoras theorem , since it is a right angled triangle ,
side 1 = 10cm
side 2 = x cm
side 3 = x cm
Pythagoras theorem states that the area of the square whose side is the hypotenuse is equal to the sum of the areas of the squares on the other two sides. That is

100 = 
divide through by 2 , we have
50 = 
find the square root of both sides


340 = 100%
34 = 10% (Divide 100% digit by 10 to get 10%)
102 = 30% (Multiply 10% by 3)
340 + 102 = 442 ( To get 130%, which is 100% with the 30% increase)
442 = 130%
Hope this helped!
Related:https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-linear-equations-functions/8th-slope/v/...
go to this website it will help