
<em>Find the gradient of the line joining (-1,9) and (3,5)</em>
<em />
Use the slope formula:-

Replace the letters with the numbers:-

On simplification,

On further simplification,


<h3>Good luck with your studies.</h3>

To prove that x = 2 in the equation given, first, we write the given.
(4) Given: (A) 12 - x = 20 - 5x
Then, add 5x to both sides of the equation,
(3) Addition property of equality: (B) 12 + 4x = 20
Then, subtract 12 from both sides of the equation
(2) Subtraction property of equality: (C) 4x = 8
Lastly, divide both sides by 4
(1) Division property of equality : (D) x = 2
The answer is A
2 is the y spot, then rise over run
Given that,
= 39
We will find the second term 

Similarly,

Now we use the option checking method,
Suppose we check 4th option
a_{n}= 6n + 33
for n=1
= 6(1) + 33 = 39

It means option D is correct