12k + 5k − 11m + 13m
please simplify

The area of square garden is 300m squared. how long is the diagonal?

A)a square brown tarp has a square green patch green in the corner the side length of the tarp is (x + 8) and the side length of the patch is x what is the area of the brown part of the tarpb)a square red placemat has a gold square in the corner the side length of the gold square is (x - 2) inches with the width of the red region is 4 in what is the area of the red part of the placemat

Robert has 78 tomatoes and 56 cucumbers he wants to plant them in equal rows how many in each row