Question

draw a tape diagram to represent each situation. for some of the situations, you need to decide what to represent with a variable.

1. diego has 7 packs of markers. each pack has x markers in it. after lin gives him 9 more markers, he has a total of 30 markers.

Explanation:

Step1: Analyze the number of markers in packs

Diego has 7 packs with $x$ markers each, so the number of markers in packs is $7x$.

Step2: Set up the equation

After getting 9 more markers, he has 30 markers. So the equation is $7x + 9=30$.

Step3: Draw the tape - diagram

Draw a long rectangle (tape). Divide it into two parts. One part is divided into 7 equal sub - rectangles to represent the 7 packs of markers (each sub - rectangle labeled $x$). The other part is a single small rectangle labeled 9. And label the whole tape as 30.

Answer:

The tape - diagram has a long rectangle divided into two parts. One part has 7 equal sub - rectangles labeled $x$ each and the other part is a single rectangle labeled 9, with the whole tape labeled 30.