Evaluate this expression: (30-5) + (-7) this what I did (25) + (-7) is 18.
Yes, that's right. `u`
thank you, Jai. how do I write an integer for elevation of 145 feet? Just 145 or +145
To evaluate the expression (30-5) + (-7), you correctly simplified the numbers within the parentheses first.
However, you made a minor mistake when adding the numbers.
Here's a step-by-step breakdown of how to correctly evaluate the expression:
1. Start by calculating the subtraction within the parentheses:
30 - 5 = 25
2. Now, add the result of the subtraction to the second part of the expression, -7:
25 + (-7)
3. According to the rules of addition, adding a negative number is the same as subtraction. Therefore, you can rewrite the expression as:
25 - 7
4. Subtract:
25 - 7 = 18
So, the correct evaluation of the expression (30-5) + (-7) is 18.