The model shows the addition expression 18 + 12. One expression that is equivalent to this sum is

What is the perimeter of a rectangle if the length is 5 and the width is x?

(05.02) mr. morris is going to save money and replace his sailboat's mainsail himself. he must determine the area of the mainsail in order to buy the correct amount of material. calculate the area of the parallelogram to determine how much material should be purchased. be sure to explain how to decompose this shape into rectangles and triangles. describe their dimensions and show your work.

For each given situation, determine if the method of randomization is either appropriate or not appropriate