What is the value of y?

B. 68°

Step-by-step explanation:

Angles in a triangle add up to 180 degrees.

y + y - 12 + 56 = 180

2y + 44 = 180

2y = 136

y = 68

here,

y°+(y-12°) +56°= 180° (sum of interior angle of a triangle is 180°)

or,y°+y°-12°+56°=180°

or, 2y°=180°-44°

or, y= 136°/2

therefore, y= 68°.

hope this helps..

that is the sum

step-by-step explanation:

there are no other answers without knowing the variables values

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)