Simplify this expression : 2x(x-1)-3x^2-(5x-4)

-x^2 - 7x + 4

Step-by-step explanation:

2x(x - 1) - 3x^2 - (5x - 4)

= 2x^2 - 2x - 3x^2 - 5x + 4

Adding like terms, we get:-

-x^2 - 7x + 4   (answer).

step-by-step explanation:

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.