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3 years ago

I need help please help me

Mathematics

1 answer:

9966 [12]3 years ago

4 0

Answer:

i cant seem to understand what u want m e to do

Step-by-step explanation:

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3 years ago

Solve x2 – 4x – 9 = 29 for x.

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$x^2 - 4x - 9 = 29 \\ x^2 - 4x - 9 - 29 = 0 \\ x^2 - 4x - 38 = 0 \\ x= \frac{-b \pm \sqrt{ b^{2} -4ac} }{2a} 
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3 years ago

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The water level in a lake was 22 inches below normal at the beginning of March. The water level decreased by 3 1/6 inches in Mar

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At the beginning it was 22 inches below normal (-22).
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3 years ago

Which complex number has a distance of radical 17 from the origin on the complex plane?

Inga [223]

Answer: LAST OPTION

Step-by-step explanation:

The complex numbers shown have the form:

$a+bi$

By definition, the distance can the distance of the complex number from the origin on the complex plane can be calculated with the formula shown below:

$d=\sqrt{a^2+b^2}$

Substitute values of each option. Then:

1) $d=\sqrt{2^2+15^2}=\sqrt{229}$

2) $d=\sqrt{17^2+1^2}=\sqrt{290}$

3) $d=\sqrt{20^2+(-3)^2}=\sqrt{409}$

4) $d=\sqrt{4^2+(-1)^2}=\sqrt{17}$ (CORRECT OPTION)

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3 years ago

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