7. Let's simplify these mixed open
a) 27 - {9+ (12 - 5)} ÷ 4

In some states the highway patrol use plane carrying radar device5s to monitor traffic as the plane flies over traffic the radar device can tell the officers how fast each car is moving at the moment in time the radar device determines the cars

The load is the pivot point of a lever.

Avoiding excess salt and sodium may benefit a person’s health by