Answer:
The answer is 4a+20....
Explanation:
Use the distributive property.
According to which when using the distributive property, you have to distribute (multiply) the 4 to the a and then the 4 to the 5. It looks like this.
4(a+5)
4(a)= 4a
4(5)=20
Thus the expression becomes:
4a+20
Thus the answer is 4a+20....