HELP PLEASEEEE MATH PROBELM

15

Step-by-step explanation:

I forgot all of my math vocab but basically because the two lines are parallel, those two angles are equal to each other, so 4x-30=2x

subtract 2x from both sides so that 2x-30=0

Now add 30 to both sides

2x=30

divide both sides by two

x=15

9514 1404 393

  (d)  192π = π(5)²h

Step-by-step explanation:

A useful first step is to put the given values into the given formula. That is illustrated in choice D.

  V = πr²h

  192π = π(5)²h