Question

If m∠CBE = 4x - 9 and m∠FBE = 5x + 15, find m∠CBE. Round to the nearest tenths place.

Answer 1

19.3

Explanation:

we know that CBE and FBE combined is a supplementary angle which is 180 degrees. first you add them both up

4x-9+5x+15=9x+6

then you know it is equal to 180 degrees

9x+6=180

then you-6 on both sides to get X by itself

9x=174

÷9. ÷9

x=19.33333333

which is 19.3 degrees