If BC = 12 and CD = 5, BD = [?]

17

Step-by-step explanation:

Since BD is the combined distance of BC and CD, we get BD to equal 12 + 5 = 17.

17

Step-by-step explanation:

BC + CD = BD

12 +5 = BD

17 = BD

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.