A football team lost 9 yards on its first play. On the next two plays they gained 3 yards and then 6 yards. Part A. What expression can be written to represent how many yards the football team is from where it started? Explain your reasoning.

y = x - 9 + 3 +3

Step-by-step explanation:

In this case we can propose an equation where x is the starting point, and y is the ending point. Now, we know all the movements of the team, if we consider the yards won as positive values and the yards lost as negative values, the equation would be as follows:

y = x - 9 + 3 +3

If we solve we have:

y = x, that is to say, where they started.

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