7-5: Lesson Quiz What is the factored form of x2 + 4xy – 21y2?
O A. xy(x + 4 – 21y)
O B. (x – 3y)(x + 7y)
C. x(x + 4y + y(4x
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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.

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step-by-step explanation:

ok thats very interesting