Question

Evaluate each expression for x=3, y= -4 and z= 6.

-y- x

-z + y - x

example from our teacher- evaluate each expression for a=-4 and b= -5
-a - (-b) <------
-(-4) - (-5) <------
4-(-5) <------
4+5=9

so i am wondering if for the questions if you do the (double negative) like a thing where it then becomes the opposite.

Answer 1

yes so basically where the negative is outside the parenthesis is a understood 1 or in your case a negative 1,is this what you needed help with?