All are negative exponent property except for the top right one
Answer: The amswer is D because -1 + 1 = 0
First Q.
If y = 6 and x = 10, then what's x if y = 18
y / x = 6 / 10 = 0.6
y / x = 18 / x = 0.6
x = 0.6 * 18
x = 10.6
Second Q.
If y = 22 and x = 8, then what's y if x = -16
y / x = 22 / 8 = 2.75
y / x = y / -16 = 2.75
y = 2.75 * -16
y = -44
By radical do you mean the square root symbol?