**Answer:**

first choice

**Step-by-step explanation:**

It is easier to create a probability table.

FOUND NOT FOUND TOTAL

REGION 1 0.70 0.30 1

REGION 2 0.40 0.60 1

REGION 3 0.30 0.70 1

The probability that during the search, the plane is not found in region 1 is 0.30. (1 - 0.70)

**Answer:**

2/9 chance or 22% chance

**Step-by-step explanation:**

You have to add up all the teachers, then turn it into a fraction. The sum of the teachers that you added up will be your denominator, then your numerator will be the probability number.

5+4=9

**Answer:**

**There is no solution to these systems of equations.**

**Explanation:**

**To solve the system of equations: 6x−2y=5 and 3x−y=10, let us find the value of y in terms of x using second equation.**

**It is obvious that **

**3x=y+10 or y=3x−10 **

**Now putting **

**y=3x−10 in first equation i.e. **

**6x−2y=5 , we get 6x−2(3x−10)= 5 or 6x−6x − 20 = 5 or −20 = 5, which is not possible**

**Answer:no the graph is not linear**

**Step-by-step explanation:**

just look at how it shaped