You'll have to substitute all the y's by 18, so our expression will stay like this:
18 - 2 =
16 = final answer
Hope it helped,
BioTeacher101
Im not sure of the answer but w is 18 and the problem is like this the 18-10=8 the sqaure root of 8 is 4 and the square root of 4 is 2 so therefore the answer is 2

Answer : 280 employees at the park have college degrees.
Hope this helps. - M