How do I find the value of x??

85

Step-by-step explanation:

The sum of the angles inside a triangle is 180 degrees.

A circle is 360 degrees, making half of it be 180 as well.

Since there are 121 degrees already marked, subtract it from 180 and you will get 59 degrees.

36 + 59 = 95

180 - 95 = 85 degrees.

x = 85

Step-by-step explanation:

angles of a triangle = 180 degrees (all angles must equal 180)

if you minus 121 from 180, it will give the interior angle which is 59 degrees

therefore 59 + 36 + x  = 180

to find x plus 59 and 36 = 95 degrees

180 - 95 = 85

x = 85 degrees

since the airplane is moving with constant speed then the distance travelled can be calculated by x=u*t

in km/h would be:

x=640*3.5=2.240 km

in m/s would be:

u=640 km/h= 640.000 m/h =640.000/ 3600 m/s =177.8 m/s

t= 3.5 h= 3.5 * 3600 s=12.600 s

then x=u*t= 177.8*12.600= 2.240.280 m

a) one student is chosen from classroom a, then a student is chosen from classroom b.  

step-by-step explanation:

independent events are ones in which the probability of one event does not affect the probability of the second event.

one student is chosen from classroom a; this does not affect the chances of choosing a student from classroom b.   this makes these independent events.

when one card is chosen from a standard deck and then set aside before a second card is chosen, the probability of the second card being chosen changes.   this makes them dependent events.

when one student is chosen from classroom a and then a second student is chosen from classroom a, the probability of choosing the second student changes.   this makes them dependent events.

when a letter is chosen from the alphabet and then a second letter is chosen, the probability of choosing the second letter changes.   this makes them dependent events.