The equation which represents x, the width of the border is 2 [(12 + 2 x) + (15 + 2 x)] = 74. What is the width of the border?

Can someone explain the elimination method to me for this problem?

1. during first 10 seconds 2. between 10 seconds and 35 seconds 3. during 35 seconds to 40 seconds

In triangles abc and wxy, a=w and b=x which of the following must be true to prove abc=wxy by the aas theorem? a.ab=bc b.bc=xy c.ab=wx d.