If the width of a rectangle is 3 and the perimeter is 20 what is the missing side length

The formula to find the perimeter of a rectangle is:

P = 2(l + w)

plug in your known values to solve for the unknown

20 = 2(l + 3)
20 = 2l + 6
14 = 2l
14/2 = l
7 = l or l = 7

you can check this by plugging your l value into the equation

P = 2(l + w)
20 = 2(7 + 3)
20 = 2(10)
20 = 20

hope this helps :)

(answer 2 )i’m very smart that’s how i know the answer.

A)26•2=52there are 2 sides with the same length116-52=64the other 2 side have to be half of 64 each64/2=32the width is 32b)make two sentences about these steps because your teacher knows how you write and explain things.