**Answer:**

It's simple. 4x39=156

**Step-by-step explanation:**

add 39 4 times. 39+39+39+39=156

**Answer:**

(-1,2)

**Step-by-step explanation:**

The solutions to the system is where the lines intersect

The lines intersect at the point (-1,2)

**Answer:**

travel 2 hour stop 1 hour then again for 2 hours

**Step-by-step explanation:**

**Answer:**

**Step-by-step explanation:**

4. intersecting

5. intersecting

6. intersecting

7.???

8.same line