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

Responses

12 + 12 + 12 + 12
12 + 12 + 12 + 12

12 + 4
12 + 4

12 ÷ 4
12 ÷ 4

4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4
4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4

4 × 12
4 × 12

1 answer

To find out how many inches are in 4 feet, we use the fact that there are 12 inches in a foot. Therefore, we can multiply the number of feet by the number of inches per foot.

The correct expressions that describe how many inches are in 4 feet are:

  1. 12 + 12 + 12 + 12 (This adds the inches for each foot.)
  2. 4 × 12 (This multiplies the number of feet by the number of inches in each foot.)

The other options do not correctly describe how to calculate the number of inches in 4 feet:

  • 12 + 4 does not make sense in this context.
  • 12 ÷ 4 does not represent the conversion from feet to inches.
  • 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 does not represent 4 feet correctly, as it sums 48 instead of the intended multiplication with 12.

Thus, the three options that apply are:

  1. 12 + 12 + 12 + 12
  2. 4 × 12

Unfortunately, only two options are correct based on the provided expressions. The third correct expression is not listed. The addition of the 12's is valid, but the ‘4 + 4 + ...’ is excessive and represents the wrong equivalency.

The best answers are:

  • 12 + 12 + 12 + 12
  • 4 × 12