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mart [117]
2 years ago
12

I ONLY NEED THE CHECK PART PLEASEEEE HELP ASAPPP i’ll mark brainliest !!!

Mathematics
2 answers:
inysia [295]2 years ago
7 0

Answer:

x=-10

Step-by-step explanation:

(3x+2)/4=-7

3x+2=4×-7

3x=-28-2

3x=-30

x=-10

PolarNik [594]2 years ago
4 0

Answer:

\frac{3(-10) + 2}{4}  = \frac{-30 + 2}{4} = \frac{-28}{4} = -7

Step-by-step explanation:

<u>Solve:</u>  

3x+2 = 4(-7)

3x+2 = -28

3x = -30

x = -10

<u>Check:</u>

\frac{3(-10) + 2}{4}  = \frac{-30 + 2}{4} = \frac{-28}{4} = -7

To check your answer to an equation, just plug your answer in place of x, and see if you get the same answer as the original equation.

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Leno4ka [110]

Answer:

x=2+\frac{1}{2}\sqrt[]{21}

or

x=2-\frac{1}{2}\sqrt{{21}

Step-by-step explanation:

4x^2-16x-26=-21

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4x^2-16x-26+21=-21+21

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x=\frac{-b\frac{+}{}\sqrt[]{b^2-4ac}  }{2a}

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x=\frac{16\frac{+}{}\sqrt[]{256+80}  }{8}

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x=\frac{16\frac{+}{}\sqrt[]{2^2*2^2*21}  }{8}

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x=\frac{16\frac{+}{}4\sqrt[]{21}  }{8}

---------------------------------------------------------------------------

x=\frac{16}{8}+\frac{4\sqrt[]{21}}{8}

x=2+\frac{1}{2}\sqrt[]{21}

---------------------------------------------------------------------------

x=\frac{16}{8}-\frac{4\sqrt[]{21}}{8}\\x=2-\frac{1}{2}\sqrt{{21}

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2 years ago
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Step-by-step explanation:

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