Ihave to finish this fast

select the algebraic expression for the difference of thirteen and three times a number cubed

3 x minus 13

3 x cubed plus 13

13 minus 3 x cubed

1) for the triangle shown, find the value of x. a) 4 b) 6 c) 8 d) 10 e) none of the above 2) for the triangle shown, find the value of y. a) 8 b) 8√2 c) 8√3 d) 16√3 e) none of the above