In the diagram, which must be true for point D to be an orthocenter?
O BE, CF and AG are angle bisectors.
O BE L AC, AG L BC, and CF L AB.
O BE bisects AC, CF bisects AB, and AG bisects BC.
O BE is a perpendicular bisector of AC, CF is a
perpendicular bisector of AB, and AG is a
perpendicular bisector of BC.

b) 36

step-by-step explanation:

18 times 2 is 36

i dony know

step-by-step explanation:

y = 2x

step-by-step explanation:

if you divide each number in the sequence, you'll see that they all have a multiple factor of 2. each number in the series, and any other numbers which may continue, will be multiplied by 2. therefore, y is the next number in the sequence, and x is the current one, so, our formula will be y = 2x.

it would take 7/10 of an hour too fill the pool.

step-by-step explanation: