1 yard = 3 feet, so we would do 3×84, which is 252.
There are 252 feet in 84 yards.
step by step explanation:

=[x2+16=0x26]
=[2x{y}^2{16}~0]
=[4×{y}^0{16}]
=[32x{y}^x]
Trinomial is the ancer to the first one
I hope you can read this, and I hope you understand how I did 7. I probably overworked it, and it was possibly a simpler way to get it.