How can you decide which variable to solve for first when you are solving a linear system by substitution

1 answer:

7 0

There are many factors, it is all a matter of preference, normally, you want to try to solve for the easiest one to get to
example

if y ou had

(x-3)^2+y=9
you would solve for y becuase it is less tricky

it is all a matter of preference

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STatiana [176]

Answer:

6.32

Step-by-step explanation:

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3 years ago

What is lim x→-3 sqrt x^2-8

vitfil [10]

If the -8 is under the square root, then...

$\displaystyle L = \lim_{x\to -3} \sqrt{x^2-8}\\\\L = \sqrt{(-3)^2-8}\\\\L = \sqrt{9-8}\\\\L = \sqrt{1}\\\\L = 1\\\\$

If the -8 is not under the square root, then...

$\displaystyle L = \lim_{x\to -3} \sqrt{x^2}-8\\\\L = \sqrt{(-3)^2}-8\\\\L = \sqrt{9}-8\\\\L = 3-8\\\\L = -5$

Either way, we replace x with -3 and simplify.

For more information, refer to the direct substitution rule for limits.

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1 year ago

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Anna [14]

It’s not a function
That’s all I know sorry!

6 0

3 years ago

2x(9x^2+5y) polynomial operations

Annette [7]

Mathpapa will give you the answer to this and explain the steps!

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3 years ago

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Keith_Richards [23]

Answer:

Answer 2.

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