CAN YALL PLEASE HELP???

x = 11, arc RB = 150°

Step-by-step explanation:

The secant- secant angle RDB is calculated as half the difference of its intercepted arcs, that is

∠ RDB = ( RB - EC ), that is

5x - 10 = ( 13x + 7 - 60 )

Multiply both sides by 2 to clear the fraction

10x - 20 = 13x - 53 ( subtract 13x from both sides )

- 3x - 20 = - 53 ( add 20 to both sides )

- 3x = - 33 ( divide both sides by - 3 )

x = 11

Thus

arc RB = 13x + 7 = 13(11) + 7 = 143 + 7 = 150°

false

step-by-step explanation:

false.   two legs of the trapezoid would be congruent, but the other two would not.   were all the legs congruent, then we'd have a square; were the 2 shorter sides congruent and the 2 longer sides also congruent, we'd have a rectangle.

a. is correct