B - 4.2 < -7.5
subtract b and 4.2
less then sign is <
then <-7.5
The answer is 8 by itself i think
Sir you don’t even have a question
If angle BCD measures 70° then so does angle DBC (because you have formed an isoceles triangle inside the larger ΔABC and the two legs are equal so the two angles have to be equal. So we have a two 70° angles which leaves 40° for the 3rd angle, which is ∠BDC.
Since ∠BDC and ∠ADB are supplementary (180°) - that leaves 140° for ∠ADB and is our answer
For this case we have the following expression:

By definition, a coefficient is the term that accompanies one or more variables.
For example:

The coefficient of the linear term is 3.
So, in the given expression we have to:
-4 is the term that accompanies the variables xy.
Answer:
-4