Question

Which expressions are equal to y. Select all that apply

5(1/2y)
4-3y
1/3y+2/3y
12y-11y
-7y+8y
Y(0)

Answer 1

The expressions that are equal to y are:

`(1)/(3)y + (2)/(3)y`

`12y - 11y`

`-7y + 8y`

Solution:

We have to find the expressions that are equal to y

Option 1:

`5((1)/(2)y) = (5y)/(2)`

So this expression is not equal to "y"

Option 2:

`4 - 3y`

So this expression is also not equal to "y"

Option 3:

`(1)/(3)y+(2)/(3)y = (y)/(3) + (2y)/(3) = (y + 2y)/(3) = (3y)/(3) = y`

Thus this expression is equal to y

Option 4:

`12y - 11y = 1y = y`

Thus this expression is equal to y

Option 5:

`-7y + 8y = 1y = y`

Thus this expression is equal to y

Option 6:

`y(0) = 0`

So this expression is also not equal to "y"