Posted by brooke on .
can you please evaluate these expressions if x=5 y=3.5 and w= 3
1.2x15
2.2y=89
3.wx10yw

Math, not "11th grade" 
Writeacher,
Assistance needed.
Please type your subject in the School Subject box. Any other words are likely to delay responses from a teacher who knows that subject well. 
11th grade 
Christiaan,
The   signs mean "absolute value". When you take the absolute value of a number, you always take the numbers positive value. So 5 = 5, 21 = 21, 24 = 24, 5 = 5, and so on.
So, for the first expression, if we replace the x with 5, we get that:
2*x15 = (2*5)15 = 1015 = 5 = 5
There seems to be an error in your second expression, because there can't be any equals signs inside the  signs.
For the third expression we get that:
wx10yw =
35  (10*3.5)(3) =
8   35 + 3 =
8  38 = 30