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 + 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

12 ÷ 4
12 ÷ 4

4 × 12
4 × 12

12 + 12 + 12 + 12

1 answer

To find out how many inches are in 4 feet, we can multiply the number of feet by the number of inches in one foot. Since there are 12 inches in a foot, we can express this as:

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

Now, let's evaluate the given expressions:

  1. 12 + 4: This expression does not represent the conversion of feet to inches. It simply adds 12 and 4 together. (Not applicable)

  2. 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4: This expression is equivalent to adding 4 twelve times, which is 4 multiplied by 12 (4 × 12 = 48). (Applicable)

  3. 12 ÷ 4: This expression calculates how many inches are in 1 foot if dividing 12 inches by 4, which results in 3. It does not represent how many inches are in 4 feet. (Not applicable)

  4. 4 × 12: This expression directly calculates the total number of inches in 4 feet, which equals 48 inches. (Applicable)

  5. 12 + 12 + 12 + 12: This expression adds 12 four times, which also equals 48 inches (12 × 4 = 48). (Applicable)

So, the expressions that describe how many inches are in 4 feet are:

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

These three options apply.