Answer:
d
Step-by-step explanation:
let side of smaller triangle=x
x²+x²=7²
2x²=49

=110 sq. ft
Answer - Yes it’s rational
You would divide 51 by 2 to get the answer, as the units are the same, for an answer of 25 two-thirds foot sized pieces, with 1 as a remainder.
I am pretty sure it's Y=2/5x - 4.8. I'm sorry if it's wrong