What pair of angles are adjacent

The correct answer is B

i.e. ∠DHB and ∠BHF are adjacent pair of angles

Step-by-step explanation:

Adjacent pair of angles are the angles that have a common vertex and a common side.

.In the given question H is the common vertex and HB is the common side.

So ∠DHB and ∠BHF are made with a common vertex H and side BH. So these are adjacent  pair of angles.

expression #3 is not equivalent. the others are.

answer: first option i.e. 'a' is correct.

step-by-step explanation:

since we have given that

number of minutes to wrap a small gift box = 4 minutes

we need to find the number of gifts to be wrapped in 5 minutes

since there is a direct variation, as the number of minutes will increase with   number of gifts to be wrapped.

so, let the number of gifts to be wrapped in 5 minutes be x.

so, it becomes,

hence, first option 'a'   is correct.