Some please help me with these two

x=5, angle 1 = 140 degrees, angle 2 = 40 degrees, angle 3 = 65 degrees

Step-by-step explanation:

1)

19x-18=(7x+1)+(10x-9)

19x-18=17x-8

2x=10

x=5

2)

angle 1 = 60+80

angle 2= 180-(60+80) or 180-angle 1

angle 3 = 180 - (180-105) - angle 2 = 105 - angle 2

8 2/3 is the answer

step-by-step explanation: just use a calculator

you didn't post any answer choices, so its not 100% clear what your teacher is looking for

however, log(15/7) is equivalent to log(15) - log(7)

i'm using the rule log(x/y) = log(x) - log(y)