A combination wrench has a box-end wrench on one end and an open-end wrench on the other.

In a three-speed car first gear is used to get the car moving. Second gear is used to get it moving a little fester. Then it is placed in third gear when it has reached a higher speed and needs less power to make it move even fester. When the third gear is engaged, no gear reduction is taking place and the engine speed is reflected in the speed at which the wheels turn.

When the sum of two angles is 180 degrees, the angles are said to be supplemental toeach other. Tofind the supplement, subtract 55 from 180 (180 55 = 125).

The bulb will burn dimmer because its full potential isn't used; it will last longer for the same reason.