Please help I don’t know how to do this

Rectangle leg this 11feet and perimeter of 38feet what is the width of the rectangle in feet

Sheila wants to bake six muffins but the recipe is for 12 muffins . this means you only need half of the ingredients listed how much of the of each ingredient does she need? one cup and banana chips ,7 tablespoons oil , two eggs, 3/4 cups flour 1/4 cup walnuts show all you work and justify your answer using a baby toulmin.

How do i make someone brainliest? (if you answer me, i might be able to make you brainliest! )