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3 years ago

Is y = x^2 - 8 a linear equation?

Mathematics

2 answers:

Mekhanik [1.2K]3 years ago

7 0

Step-by-step explanation:

Hey there!

Given eqaution is;

y = x^2 - 8.

It is not a linear equation.

Reason:

The power of the equation is more than one or its power is 2.

As we know that linear equation has power one on its variable so, it can't be considered as linear equation. Example of linear equation is; y= 2x+8. where "X" variable has only "1" power.

Therefore, the equation is not a linear equation.

Hope it helps...

Paul [167]3 years ago

7 0

Answer:

Step-by-step explanation:

linear equation is y=mx+b(slope and y-intercept form)

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3 years ago

a laboratory, you determine that the density of a certain solid is 5.23×10−6kg/mm3. Convert this density into kilograms per cubi

Vedmedyk [2.9K]

Answer:

$5.23\times 10^{-6}\ kg/mm^3=5230\ kg/m^3$

Step-by-step explanation:

Given : The density of a certain solid is $5.23\times 10^{-6}$ kg/mm³.

To find : Convert this density into kilograms per cubic meter ?

Solution :

We know that,

$1\ m^3=10^9\ mm^3$

or $10^9\ mm^3=1\ m^3$

So, $1 mm^3=\frac{1}{10^9}\ m^3$

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Converting $5.23\times 10^{-6}$ kg/mm³ into kg/m³,

$5.23\times 10^{-6}\ kg/mm^3=\frac{5.23\times 10^{-6}}{10^{-9}}\ kg/m^3$

$5.23\times 10^{-6}\ kg/mm^3=5.23\times 10^{-6+9}\ kg/m^3$

$5.23\times 10^{-6}\ kg/mm^3=5.23\times 10^{3}\ kg/m^3$

$5.23\times 10^{-6}\ kg/mm^3=5230\ kg/m^3$

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3 years ago

Solve the system by substitution 5x+y=-10. 4x-7y=-8

storchak [24]

Answer:

x = -2 and y = 0

Step-by-step explanation:

5x + y = -10

4x - 7y = -8

Rearrange the first equation to equal y.

5x + y = -10

y = -10 - 5x

Replace y in the second equation with the first equation.

4x - 7y = -8

4x - 7(-10 - 5x) = -8

4x - (-70 -35x) = -8

4x + 70 + 35x = -8

Rearrange the equation to find x.

4x + 35x = -8 - 70

39x = -78

x = -2

Now that you know x, use the rearranged first equation to find y.

y = -10 - 5x

y = -10 - 5(-2)

y = -10 + 10

y = 0

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