The answer is definitely not 7.777777
Answer:
10.16
Step-by-step explanation:
7 = 2n - 2
n= a number so twice a number is 2n and 7 is 2 less than twice this number.
By the Pythagorean theorem
.. x = √((2√3)^2 -(√6)^2) = √(12 -6) = √6 . . . . cm
x = √6 cm
