Answer:
wooooooooooooooooooooooooooo
A.A is your best answer
A vertex is "the apex" of the angle.
See attached photo.
hope this helps
3x - y = 10 . . . (1)
-x + y = 12 . . . (2)
(1) + (2) => 2x = 22 => x = 22/2 = 11
From 2, -11 + y = 12 => y = 12 + 11 = 23
she needs 10 feet because 6 2/3 yard converted into feet is 20 and 30-20=10
Steps:
7 5/8 + 5 3/4
7 5/8 + 5 6/8
12 11/8
13 3/8
19 1/2 - 13 3/8
19 4/8 - 13 3/8
6 1/8
ANSWER: 6 1/8