Which of the following equations have exactly one solution?

B

Step-by-step explanation:

You can try to solve each:

A.

add 31 to both sides

subtract 2x from both sides

This means infinite solutions

B.

add 31 to both sides

add 2x to both sides

divide both sides by 4

This does have one solution

C.

subtract 31 from both sides

subtract 2x from both sides

This is not true, so no solutions

D.

add 2 to both sides

subtract 2x from both sides

0 = -29

not true, so b is the answer.

1 1/4 hours

step-by-step explanation:

2/4 + 2/4 + 1/4 = 5/4 or 1 1/4

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