Question

K

Which two expressions are equivalent?
A (14-6)-y and 14-(6-y)
B: y (164) and (y + 4) + 16
C: (9+7) y and 9+ (7.y)
D: (11-2)-y and 11- (2-y)

Answer 1

A and D

Explanation:

first subtraction is communtative

A, 14-6-y =8-y

14-6-y=8-y

so both of them are equivalent

B, y(164)=164y

(y+4)+16=y+20

so 164y and y+20 are not equivalent

C, (9+7)y =16y

9+(7y)=9+7y

so they are not equivalent

D, (11-2)-y= 9-y

11-(2-y)=9-y

so they are equivalent