Hey there! I'm happy to help!
If angles are complementary, they add up 90 degrees.
This means that 2x-13+4x-5=90
Let's solve this equation now.
2x-13+4x-5=90
We combine like terms.
6x-18=90
We add 18 to both sides.
6x=108
x=18
Now we plug this x value into the value for angle B.
4(18)-5
72-5
67
Therefore, the measure of angle B is 67 degrees.
Have a wonderful day!