Find the 12th Term of the sequence -16, -12,-8,-4...

With #! i’ve tried to figure it out but i can’t.

Sadie computes the perimeter of a rectangle by adding the length, l, and width, w, and doubling this sum. eric computes the perimeter of a rectangle by doubling the length, l, doubling the width, w, and adding the doubled amounts. write an equation for sadie’s way of calculating the

What is the sum of these mixed numbers 2 1/8 + 4 3/8