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3 years ago

Solve for y 3x -4y = 12

Mathematics

1 answer:

fomenos3 years ago

4 0

Answer:

y = 3/4x - 4

Step-by-step explanation:

<u>Solving for y:</u>

3x -4y = 12
4y = 3x - 12
y = 3x/4 - 12/4
y = 3/4x - 4

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Length of rectangle is 1 unit

<u>Solution: </u>

Given that

Length of a rectangle is width minus 8 units.

Area of rectangle = 9 square units

Need to calculate the length of rectangle.

Let us assume width of rectangle = x

As Length is width minus 8,

Length of the rectangle = x – 8

$\text{ Area of rectangle }=\text{ width of rectangle }\times \text{ Length of the rectangle }$

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$\begin{array}{l}{\Rightarrow x^{2}-8 x=9} \\\\ {\Rightarrow x^{2}-8 x-9=0}\end{array}$

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$\begin{array}{l}{\Rightarrow x^{2}-9 x+x-9=0} \\\\ {\Rightarrow x(x-9)+1(x-9)=0} \\\\ {\Rightarrow (x-9)(x+1)=0}\end{array}$

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2 years ago

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blagie [28]

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Step-by-step explanation:

idk

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2 years ago