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3 years ago

What is this? Ianjansjshshsjssjsjjss

Mathematics

1 answer:

larisa86 [58]3 years ago

3 0

Answer:

1.2

Step-by-step explanation:

We want to find the y value when x = -6

When x = -6, y = 1.2

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the sum of three numbers is 106. the first number is 6 less than the second. the third is 2 times the first

Tems11 [23]

Answer: 31/25/50

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3 years ago

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4 years ago

Solve for the sqrt(x-2)+8=x

kirza4 [7]

<h3>Answer: x = 11</h3>

==============================================

Work Shown:

$\sqrt{x-2}+8=x\\\sqrt{x-2}=x-8\\\left(\sqrt{x-2}\right)^2=(x-8)^2 \text{ square both sides}\\x-2=x^2-16x+64\\0=x^2-16x+64-x+2\\0=x^2-17x+66\\x^2-17x+66 = 0\\(x-11)(x-6) = 0\\x-11 = 0 \text{ or } x-6 = 0\\x = 11 \text{ or } x = 6\\$

Those are the two possible solutions . We need to check each possible solution.

Plug in x = 11 then simplify. If we get the same number on both sides, then x = 11 is confirmed.

$\sqrt{x-2}+8=x\\\sqrt{11-2}+8=11\\\sqrt{9}+8=11\\3+8=11\\11=11\\$

We get 11 on both sides, so the solution x = 11 is confirmed.

Repeat for x = 6 as well

$\sqrt{x-2}+8=x\\\sqrt{6-2}+8=6\\\sqrt{4}+8=6\\2+8=6\\10=6\\$

We do not get the same thing on both sides, so x = 6 is not a solution. We consider this extraneous.

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3 years ago