2 years ago

7.Identify the shapes of a galena crystal

Mathematics

1 answer:

Maslowich2 years ago

6 0

C) cube
a galena crystal is a cubic crystal system so it is made from cubes

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You buy a package of 12 pencils for $2.64. Write this rate as a unit rate.

andrew-mc [135]

Answer:

0.22 per

Step-by-step explanation:

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2 years ago

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observe as seguintes situações e sua representação em linguagem matematica dois numeros x e y são tais 2x y=6 x-y=3

agasfer [191]

Answer:

The value of x any y are "-5.29 and 0.79" and "3.79 and -2.29"

Step-by-step explanation:

Given values:

$2xy =6.....(a)\\\\x-y= 3.....(b)\\\\$

After solve equation (a) we get

$\ equation: \\\\2xy= 6\\\\xy =\frac{6}{2} \\\\xy = 3.....(x)\\\\$

After solve equation (b) we get

$\ equation: \\\\x-y =3\\\\x= 3+y....(x1)\\$

put the value of x in to equation (x)

$(3+y)y = 3\\$

$y^2+3y-3=0\\\\\ compare \ the \ value \ with \ ay^2+by+c=0\\a= 1\\b=3\\c=-3\\\ Formula: \\y= \frac{-b\pm\sqrt{b^2-4ac}}{2a}\\y= \frac{-3\pm \sqrt{9+12}}{2}\\y= \frac{-3\pm \sqrt{21}}{2}\\$

The value of y is = -5.29 and 0.79, put the value of y in x1 equation so, we get: 3.79 and -2.29

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2 years ago

Please answer! What is number 9, please explain!

snow_tiger [21]

Like what u need help with

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2 years ago

At a bottling plant, 10,000 liters of carbonated water

Dvinal [7]

Answer:

2500

Step-by-step explanation:

10,000/3,000=10/3

10x750=7500

7500/3=2500

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3 years ago

I need step by step instructions on how to get the y-intercept: -210 for f(x)=x^3-18x^2+107x-210.

Mrrafil [7]

Y=f(X)
At y-intercept, X=0
f(X)= 0^3-18(0)^3+107(0)-210
= -210

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2 years ago