Question

Determine the value of the model below.

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

4 white balls
3 black balls


The total value of the model __ is .
.

Answer 1

is that correct

Answer 2

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 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**.