What is the formula for the following arithmetic sequence? -9,-2,5,12

-9 + (n-1)-7

Step-by-step explanation:

formular for AP is

a+ (n-1)d

where A is -9

d is 5--2=7

or -2--9=7

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