So i need help with this...

60 degrees

Step-by-step explanation:

Triangles are always equal to 180 degrees. So take the sum of the given numbers and subtract it from 180.

78+42=120

180-120=60 degrees. Hope this helps! :)

answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0

hi how are you doing today? if you ever need just tell me

step-by-step explanation: