Final answer:
The expression 0.8*-23+0.8*-7 is evaluated by multiplying 0.8 with -23 and 0.8 with -7 separately, then adding both products to arrive at the final answer of -24.
Step-by-step explanation:
The question asks us to calculate the expression 0.8*-23+0.8*-7. To solve this, we will perform each multiplication separately and then add the results:
- Multiply 0.8 by -23 to get -18.4.
- Multiply 0.8 by -7 to get -5.6.
- Add the results of the two multiplications: -18.4 + (-5.6).
- Adding a negative number is the same as subtracting its positive equivalent, so the calculation becomes -18.4 - 5.6.
- When we subtract 5.6 from -18.4, we get -24.
Therefore, the final answer to 0.8*-23+0.8*-7 is -24.