Answer:
16
Explanation:
1. Use acronym PEMDAS (parentheses, exponents, multiplication/division, addition/subtraction) to determine the order of operations.
2. Since there are no parentheses or exponents, multiply first:
4*5=20
3. Now, the expression reads 20+-4. Adding a negative is the same as subtracting that value.
20-4=16
Hope this helps!!