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11111nata11111 [884]
3 years ago
13

3x + 17 = 2x - 6 What’s the answer for x

Mathematics
1 answer:
julia-pushkina [17]3 years ago
7 0
3x+17=2x-6
-2x -2x * subtract 2x from both sides* *3x-2x is 1x*
1x+17=-6 *now subtract 17 from both sides*
-17 -17
1x=-23
1x. 1x
x=23
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Given the equation Square root of 8x plus 1 = 5, solve for x and identify if it is an extraneous solution.
Kisachek [45]
Do recall that squaring and the *radical sign* cancel each other out... like so:(\sqrt{a})^{2}= a

When you put it that way, it isn't enough :P
(\sqrt{a})^{2}= a
(\sqrt{8x+1})^{2}=?

so you start with
(\sqrt{8x+1})^{2}= (5)^{2}
8x+1=25 <-- subtract 1 to both sides
8x=24 <- divide 8 to both sides
x= 3

To find out if it's an extraneous solution ask yourself: It mustn't result in a radical that I like to call... 'illegal'. Plug it into the radicand 8x+1 and make sure you get something that is not a negative number.... so, DO you get a negative number when you plug in x = 3 into the radicand?

(extraneous solution is a invalid solution)

x=3 not extraneous


6 0
3 years ago
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If 2x<br> + 13x – 7 = 0, then x could equal to which of the following?
Leokris [45]

Answer:

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Step-by-step explanation:

15x - 7 = 0

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x = 7/15

7 0
3 years ago
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A 12-foot ladder is leaning against a wall. The distance from the base of the wall to the base of the ladder is 6 StartRoot 2 En
Hoochie [10]

Answer:

a

b

d

e

Step-by-step explanation:

he triangle is isosceles.

The leg-to-hypotenuse ratio is 1:StartRoot 2 EndRoot.

The leg-to-hypotenuse ratio is 1:StartFraction StartRoot 2 EndRoot Over 2 EndRoot. The nonright angles are congruent. The ladder represents the longest length in the triangle.

3 0
2 years ago
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Can someone help I will give the brainliest Plz help u will get 50 points
lara [203]

Answer:

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Step-by-step explanation:

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= 30 + 12 + 14

= 42+14

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Have a wonderful day

:)

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3 years ago
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3 years ago
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