Sarah can make 2, however she will have 3 feet leftover
Answer: (-x, y-7)
<u>Step-by-step explanation:</u>
A reflection across the y-axis changes the sign of the x-value.
(x, y) → (-x, y)
Shifting down 7 units subtracts 7 from the y-value.
(-x, y) → (-x, y-7)