If line ab is a diameter of circle o that bisects chord line cd at point e, which of the following statements is true?

A: The chord is perpendicular to the diameter

Proof:

CE=DE (definition of bisector)

Center O, so OC and OD are radii.

OC=OD.

OE=OE.

OCE=ODE  (SSS)

angle OEC = angle OED  (corresponding parts)

angle OEC  and angle OED are supplementary

So angle OEC and angle OED are both right angles.

CD is perpendicular to OE

CD is perpendicular to AB

30 miles

step-by-step explanation:

we know that 60 seconds equals 1 minute and 60 minutes 1 hour

44 ft       60 sec     60 min     158400   ft

  *   *   =

1 sec       1 min       1 hour         hour

we know that there are 5280 ft per mile

158400   ft       1 mile         30 miles

  *   =

1   hour               5280 ft     1 hour

so in 1 hour   it can travel 30 miles

option 3 . (5x + 1) - (-10x + 6)

step-by-step explanation:

option 1 :

(4x + 3) + (-9x + 4)

or 4x+3 -9x + 4

or -5x + 7

option 2

(x - 2) - (6x - 9)

or x-2-6x + 9

or -5x + 7

option 3

(5x+ + 6)

or 5x + 1 + 10x -6

or 15x -5

option 4

-4x+2x+7-3x

-7x + 2x + 7

-5x + 7

hence only option 3 did   not satisfy the given simplify expression.