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kifflom [539]
3 years ago
13

Write an equation for the line that passes through the points (1,4) and (2, -4).

Mathematics
2 answers:
Tom [10]3 years ago
6 0

Answer:

-8

Step-by-step explanation:

We can use the formula [ y2-y1/x2-x1 ] to solve.

-4-4/2-1

-8/1

-8

Best of Luck!

Alchen [17]3 years ago
3 0

First of all, Let's find the slope because we need it on the formula for finding the y-intercept.

m = y2 - y1 / x2 - x1

From the points given in the question,

x1 = 1

x2 = 2

y1 = 4

y2 = -4

Plugging in the above formula,

➝ m = -4 - 4 / 2 - 1

➝ m = -8 / 1

➝ m = -8

Now finding the y-intercept:

➝ y = mx + b

And if we put in the values from our first point (1, 4) we get

➝ 1 = -8 (4) + b

➝ 1 = -32 + b

➝ b = 1 + 32

➝ b = 33

Required equation of the line:

➝ y = -8x + 33

Carry On Learning !

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What is the value of x in the equation, 70 = 12 + 9x – 2(x + 6)
lesantik [10]
<h3>Solution :-</h3>

➩ 70 = 12 + 9x - 2 ( x + 6 )

➩ 70 = 12 + 9x - 2x - 12

➩ 70 = 0 + 7x

➩ 70 = 7x

Here we can use 2 methods

Methods :-

  1. Trial and error method :- By adding,subtracting , multiplying or dividing the same variable or constant on LHS & RHS
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• Transposing

By transposing 7 from RHS. to LHS

➩ 70/7 = x

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6 0
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alex41 [277]

Answer:

The answer is x= -16!

Step-by-step explanation:

-4(x-7)=36

-4x- 28= 36

     +28    +28

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/-4     /-4

x= -16

I hope this helps!

p.s. have any more questions? Post the question and comment the link below!

Ciao!

♥, Sadie  

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