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3 years ago

6. What is the y-value to the solution of y = 5x -4 y = 2x + 8?

Mathematics

1 answer:

Angelina_Jolie [31]3 years ago

8 0

Answer:

y = 16, don't know if I'm 100% right but hope this helps.

Step-by-step explanation:

since they both equal Y they may be equal to each other

Then you would subtract 2x from both sides canceling it out on one side

2x + 8 = 5x - 4

-2x -2x

This would make the equation 8 = 3x - 4

next you add the 4 from both sides

8 = 3x - 4

+4 +4

This will leave you with 12 = 3x

now you divide 3 from both sides and 12/3 = 4 makes X = 4

next you take (4) and plug it in to one of the equations

y = 2(4) + 8

y = 8 + 8

y = 16

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Given:

The expression is

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To find:

The simplified form of the given expression.

Solution:

We have,

$\dfrac{2}{a-2}-\dfrac{8}{a^2-4}$

It can be written as

$=\dfrac{2}{a-2}-\dfrac{8}{a^2-2^2}$

$=\dfrac{2}{a-2}-\dfrac{8}{(a-2)(a+2)}$ $[\because a^2-b^2=(a-b)(a+b)]$

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