Verify this closure property of subtraction x= -4/5 , y= 1/-10​

x - y is also a rational number. Hence satisfies the closure property.

Step-by-step explanation:

Closure property of subtraction states that for any two integers a and b, (a - b) must also be an integer.

Here x and y are rational numbers. so x - y must also be rational to satisfy the closure property.

13

step-by-step explanation:

169-1=168

168-3=165

165-5=160

160-7=153

153-9=144

144-11=133

133-13=120

120-15=105

105-17=88

88-19=69

69-21=48

48-23=25

25-25=0

since it took 13times to completely subtract it hence its square root is 13

40% off the regular price is the correct answer.

step-by-step explanation: