3 years ago

I need help with internet’s I am not doing good in math and I really need help

Mathematics

1 answer:

sweet [91]3 years ago

5 0

Answer:

Then get some help

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Help please! 6x^2+2x-9=0 A 6.4, -8.4 B 1.1, -1.4 C -2.2, 2.8 D -1.1, -1.4

Yakvenalex [24]

$6x^2+2x-9=0\\\\a=6;\ b=2;\ c=-9\\\\\Delta=b^2-4ac\to\Delta=2^2-4\cdot6\cdot(-9)=220\\\\x_1=\dfrac{-b-\sqrt\Delta}{2a};\ x_2=\dfrac{-b+\sqrt\Delta}{2a}\\\\x_1=\dfrac{-2-\sqrt{220}}{2\cdot6}=\dfrac{-2-\sqrt{220}}{12}\approx-1.4\\\\x_2=\dfrac{-2+\sqrt{220}}{2\cdot6}=\dfrac{-2+\sqrt{220}}{12}\approx1.1$

Answer: B. 1.1; -1.4.

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3 years ago

LuckyWell [14K]

Answer:

Not sure sorry Im really bad at this stuff

Step-by-step explanation:

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3 years ago

Need help understanding this question

harkovskaia [24]

Answer:

-9<x≤2

Step-by-step explanation:

The domain is the x values

If we look at the line, we see a closed circle when x=2, so x is less than or equal to 2

The other circle is open and is at -9, so x is greater than -9

-9<x≤2

Lemme know if u need more explanation!

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3 years ago

Write each phrase as an algebraic expression. 16 seconds faster than Aya’s time.

Liula [17]

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X+16

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Find the value of Angle X

jarptica [38.1K]

The angle based on the diameter is always right

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2 years ago