Answer:
y=x+8 because your friend's allowance is y but also $8 more than yours, x. x+8 is her allowance so x+8=y
The maximum possible length it could have been is 38.9
The answer would defintley be 69 if you want the right answer.

there are 300 students in the high school.
hope this helps
Answer:
80/3 or 26 2/3
Step-by-step explanation:
-2 + y = 9 (subtract y from both sides)
-2 = 9 - y (subtract 9 from both sides)
-2 - 9 = y (multiply both sides by -1)
2 + 9 = y (simplify)
11 = y (substitute)
3x - 7 (11) = 3 (multiply)
3x - 77 = 3 (subtract 3 from both sides)
3x - 80 = 0 (subtract 3x from both sides)
-80 = -3x (multiply both sides by -1)
80 = 3x (divide both sides by 3)
80/3 = x (simplify if needed)
26 2/3 = x