Answer:
m∠EBC=34°
Step-by-step explanation:
We establish that
m∠DBC=m∠DBE+m∠EBC
Refer to the accompanying diagram for clarity on the issue
Replace the known values in the equation and determine x

Calculate the size of angle EBC
m∠EBC=(3x+13)°
Insert the value for x
m∠EBC=(3(7)+13)°
m∠EBC=(21+13)°
m∠EBC=34°
Total albums:
8 + 12 + 4 = 24
The probability of selecting both blue albums equals the probability of picking the first blue multiplied by the probability of choosing the second blue
P(First blue) = 12/20
P(Second blue) = 11/19
P(Both blue) = 12/20 x 11/19
= 33/95
Two hundreds total 200.
Fifteen tens together make 150.
Six ones equals the same.
10 billions in the place of the 6