Answer:
The required expression is 20+9-4-(-4).
Step-by-step explanation:
Consider the provided information.
We will use the "+" sign for gains and "-" sign to represents the loss.
A football player starts on the 20 yard line and gains 9 yards. This can be written as: 20+9
On the next play, he loses 4 yards. This can be written as 20+9-4
The referee says there is a penalty and takes away the 4-yard loss of yardage. This can be written as:
20+9-4-(-4)
Hence, the required expression is 20+9-4-(-4).
