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3 years ago

Please help me answer this PLEASE

Mathematics

1 answer:

Alina [70]3 years ago

5 0

The answer is C because it is

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3 years ago

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3 years ago

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3 years ago

Solve <br> (3x+4) (2x-1)=0 <br> X(4x+3)= 0

kotegsom [21]

Answer:

x = -4/3 x = 1/2

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Step-by-step explanation:

(3x+4) (2x-1)=0

Using the zero product property

3x+4 = 0 2x-1 =0

3x= -4 2x= 1

x = -4/3 x = 1/2

x (4x+3) =0

Using the zero product property

x = 0 4x+3 = 0

x=0 4x=-3

x=0 x = -3/4

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4 years ago

<img src="https://tex.z-dn.net/?f=%20-%203%289x%20%2B%2020%29%20%5Cgeqslant%2015x%20-%2020" id="TexFormula1" title=" - 3(9x + 20

Len [333]

Answer:

$x\le \:-\frac{20}{21}$

Step-by-step explanation:

$-3\left(9x+20\right)\ge \:15x-20\\\\\mathrm{Expand\:}-3\left(9x+20\right):\quad -27x-60\\-27x-60\ge \:15x-20\\\\\mathrm{Add\:}60\mathrm{\:to\:both\:sides}\\-27x-60+60\ge \:15x-20+60\\\\\mathrm{Simplify}\\-27x\ge \:15x+40\\\\\mathrm{Subtract\:}15x\mathrm{\:from\:both\:sides}\\-27x-15x\ge \:15x+40-15x\\\\\mathrm{Simplify}\\-42x\ge \:40\\\\\mathrm{Multiply\:both\:sides\:by\:-1\:\left(reverse\:the\:inequality\right)}\\\left(-42x\right)\left(-1\right)\le \:40\left(-1\right)$

$Simplify\\42x\le \:-40\\\\\mathrm{Divide\:both\:sides\:by\:}42\\\frac{42x}{42}\le \frac{-40}{42}\\\\Simplify\\x\le \:-\frac{20}{21}$

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3 years ago