There are 12 inches in a foot. Which expressions describe how many inches are in 4 feet? Check the THREE that apply. (3 points)

• 12 + 12 + 12 + 12.
• 12 ÷ 4.
•4+4+4+4+4+4+4+4 + 4 + 4 + 4 + 4
•12 ÷ 4
• 4 × 12.

1 answer

To find out how many inches are in 4 feet, we can use the conversion factor that there are 12 inches in a foot. Therefore, the total number of inches in 4 feet can be calculated as:

\[ 4 \text{ feet} \times 12 \text{ inches/foot} = 48 \text{ inches} \]

Now, let's evaluate the provided expressions:

  1. 12 + 12 + 12 + 12: This adds up to 48 (since 12 * 4 = 48). This is correct.

  2. 12 ÷ 4: This equals 3, which does not represent the number of inches in 4 feet. This is incorrect.

  3. 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4: This adds up to 48 (since 4 * 12 = 48). This is correct.

  4. 12 ÷ 4: This is the same expression as above (it equals 3), which is incorrect. This remains incorrect.

  5. 4 × 12: This equals 48 (the calculation for inches in 4 feet). This is correct.

The three correct expressions are:

  • 12 + 12 + 12 + 12
  • 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4
  • 4 × 12