Easier question but still need a little *4/2*20%=?

Select the best attribute for the angle pair formed by two parallel lines intersected by a transversal.

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

Which expression equals 9^3 sqrt 10 a. 5 sqrt 10 + 4 sqrt 10 b. 5^3 sqrt 10 + 4 ^3 sqrt 10 c. 5 sqrt 10 + 4^3 sqrt 10 d. 5^3 sqrt 10 + 4 sqrt 10