Three lines intersect at a common point. In the figure below, m∠1=x°, m∠2=2x°, and m∠3=75°. Which equations can be used to determine the value of x? Select all that apply.

A:3x°=75°

B:3x°=105°

C:3x°=255°

D:3x°+75°=180°

E:x°+2x°+75°=180°

F:x°+2x°+3x°=360

The dolphins at the webster are fed 1/2 of a bucket of fish each day the sea otters are fed 1/2 as much fish as the dolphins how many buckets of fish are the sea fed each day? simplify you answer and write it as a proper fraction or as a whole or mixed number

Does the point (1, sqrt 7) lie on circle shown.

Justin has 750 more than eva and eva has 12 less than justin together they have a total of 63 how much money did