**Answer:**

D is the correct answer.

**Step-by-step explanation:**

First find the slope: 2-5/8-9=3 So slope is 3

(y-y1)=m(x-x1) is the point slope formula

plug in the numbers (y-5) = 3(x-9)

y-5 = 3x-27

y=3x-22

**Answer:**

x=40 and y= 60

**Step-by-step explanation:**

<u>**step:1**</u>

Let 'x' and 'y' are two numbers

given data the sum of two numbers is 100

x+y = 100......(1)

Given difference of two numbers are

x - y = -20 ......(2)

<u>**Step :2**</u>

solving the equation (1) and (2)

adding the equations (1) and (2)

x+y+x-y=100-20

cancelling 'y' terms are

2 x = 80

dividing "2" on both sides, we get

**x = 40**

<u>**Step :3**</u>

substitute x = 40 in equation (1)

x + y =100

40 + y = 100

subtracting "40" on both sides, we get

40 + y - 40 = 100 -40

**y = 60**

**Final answer:-**

**The two numbers are x = 40 and y= 60**

**Answer:**

4

**Step-by-step explanation:**

Add up all the frequencies given

5+6+5+6+5+8+4+4+3 = 46

The total frequencies with the missing data value should add up to 50

50 = 46 + x

x = 50 - 46

x = 4

<u>Answer</u>

Irrational number

<u>Explanation</u>

√42 = 6.480740698.......

Rational numbers are numbers that ca be written as a fraction. that is in form of a/b.

√42 can not be written in the form of a/b, neither is it a whole number. So √42 is not a rational number.

The answer is the last one.** irrational number. **

**Answer:**

198 / 9 = 22

**Step-by-step explanation:**