**Answer:**

Wrong. If the line segment AB= 10, then the measure of AC= 10 as well. It's a right triangle. All the sides are the same.

**Step-by-step explanation:**

**Answer:**

The answer is -1.9f-16

**Step-by-step explanation:**

**Answer:**

1 2/3

**Step-by-step explanation:**

5-3 1/3=

5-9+1/3=

5-10/3=

15/3-10/3=

5/3=1 2/3

The commutative property of multiplication

**Answer:**

A. One line

**Step-by-step explanation:**

Let rearrange the system of equations into explicit forms:

The second equation is identical to the first one, which means that there is just one line.