Short Answer 
The tape diagram illustrates the relationship between two sections, with one part labeled “a” and the other “17”, totaling to “35”. The equation formed is a + 17 = 35, which simplifies to find that a equals 18.
Step 1: Understand the Tape Diagram
The tape diagram consists of two sections that represent lengths, where the top tape is divided into two parts: one part is labeled a and the other part is 17. The bottom tape, representing the total length, is labeled 35. This visual representation helps in forming an equation based on the lengths of the tapes.
Step 2: Set Up the Equation
To express the relationship between the two tapes, combine the lengths of the top tape. The equation formed by equating the top and bottom tapes is a + 17 = 35. This shows that the total of the two parts of the top tape is equal to the length of the bottom tape.
Step 3: Solve for “a”
To find the value of a, you need to isolate it in the equation. Subtract 17 from both sides:
- a + 17 – 17 = 35 – 17
- This simplifies to a = 18.
Thus, the value of a that satisfies the equation is 18.