Which of the following expressions are equivalent to x − ( − x ) + y ?

2x+y

Step-by-step explanation:

x-(-x)+y

x+x +y

2x+y

where is the negative sign, there's an invisible 1 and just multiply it. negative by negative equals positive.

the smallest possible measurement of the width is 14 feet

step-by-step explanation:

let's assume length of parallelogram is 'l'

width of parallelogram is 'w'

the perimeter of a parallelogram must be no less than 40 feet

so, we get

we are given

length of parallelogram is 6 feet

so,

l=6

we can plug it

now, we can solve for w

subtract both sides by 12

divide both sides by 2

and we get

so,

the smallest possible measurement of the width is 14 feet