Find the length of AB.
will give brainliest if I can.

Me complete this proof! prove that a quadrilateral is a square. me with the steps for this proof.

If x is 6, then 7x= a. 13 b. 42 c. 42x d. 76

Determine the common ratio and find the next three terms of the geometric sequence. 10, 2, 0.4, a. 0.2; -0.4, -2, -10 c. 0.02; 0.08, 0.016, 0.0032 b. 0.02; -0.4, -2, -10 d. 0.2; 0.08, 0.016, 0.0032 select the best answer from the choices provided a b c d