Determine the value of the model below.

Question

Key: white ball = +1 black ball = -1

4 white balls
3 black balls

The total value of the model __ is .
.

Answer 1

To calculate the total value of the model, we can use the key provided:

• Each white ball is worth +1.
• Each black ball is worth -1.

Given:

• 4 white balls: \( 4 \times (+1) = 4 \)
• 3 black balls: \( 3 \times (-1) = -3 \)

Now, we combine these values:

\[ \text{Total value} = (4) + (-3) = 4 - 3 = 1 \]

Therefore, the total value of the model is 1.

Answer 2

is that correct

Answer 3

Yes, the calculation is correct.

To summarize:

• You have 4 white balls, which contribute \( 4 \times (+1) = +4 \).
• You have 3 black balls, which contribute \( 3 \times (-1) = -3 \).

Adding those together gives:

\[ \text{Total Value} = 4 + (-3) = 4 - 3 = 1 \]

So, the total value of the model is indeed 1.