15. -6b+2-5b=36+6b
-11b+2=36+6b
-17b+2=36
-17b=34
b=-2
16. 48+32h=-39+3h
48+29h=-39
29h=-87
h=-3
17. -20r+5=-20r+20
5¥20
no solution
18. a+7=7a+21+18-6a
a+7=a+39
7¥39
no solution
19. -8b+24=24-24b
16b+24=24
16b=0
b=0
20. 5a+4=5a-10
4¥-10
no solution
Answer:
5.14
Step-by-step explanation:
The way i solved this was i found the length of the line by taking the 2 (Width and also "A") and the 7 (The height and also "B"), squared both of them and added them together. Then found the square root. Sense i suck at explaining things this is what the equation should have looked like. 
÷ 2. (Side wait for someone else to answer because i'm 70% sure this is right.
Answer:
5
Step-by-step explanation:
Answer:
x = 10°
y = 25°
Step-by-step explanation:
3x = 5x - 20 because they are alternate interior angles
subtract 5x from each side of the equation:
-2x = -20
Divide both sides by -2:
x = 10°
The sum of the interior angles of any triangle = 180°
2y + 4Y + (5x - 20) = 180°
combine like terms:
6y + 5x - 20 = 180°
add 20 to each side:
6y + 5x = 200°
substitute for x:
6y + 5(10) = 200°
subtract 50 from each side:
6y = 150°
divide both sides by 6:
y = 25°
