Answer: p = 278 + 142
Explanation:
From the question, we are informed that Allison picked up 278 pecans from under one tree and 142 pecans from another tree.
The equation that Allison could use to find p, the numbers of pecans she picked up in all will be the addition of 278 and 142. This will be:
p = 278 + 142
The equation is p = 278 + 142