Adding together the shorter two sides results in 17 m. If these two sides were laid end to end, the sum of their sides (17 m) would be less than the length of the third side. Thus, NO triangle could be constructed with this set of line segments.
Since you're looking for the unit rate, you can start do this:

And yes,

is also correct, it's just switching around the 15
Multiply 18 by12.50 =225
multiply 18 by 5 = 90
add 225+90=315
subbtract 350 from 315 =35
35 is how much she had left over
The compatible numbers are 5220 and 60 because 522/6 = 87
I GUESS I AM RIGHT AND I REALLY HOPE THIS HELPS!!!!