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3 years ago

!SUBSTITUTION METHOD!6y - 5z = -8 3z = -6 4x - 3y - 2z= 21

Mathematics

1 answer:

hichkok12 [17]3 years ago

3 0

Answer:

Step-by-step explanation:

6y - 5z = -8 .......... Equation 1

3z = -6 ................... Equation 2

4x - 3y - 2z= 21...... Equation 3

<u>First solve for z in Equation 2</u>

That's

3z = - 6

Divide both sides by 3

Next substitute the value of z into Equation 1 in order to find y

We have

6y - 5(-2) = - 8

6y + 10 = - 8

6y = - 8 - 10

6y = - 18

Divide both sides by 6

Finally substitute the values of y and z into Equation 3 to find the value of x

That's

4x - 3(-3) - 2(-2) = 21

4x + 9 + 4 = 21

4x + 13 = 21

4x = 21 - 13

4x = 8

Divide both sides by 4

So the solutions are

Hope this helps you

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Sa = 2(pi)(r)(h) + 2(pi)(r^2) v = (pi)(r^2)(h) find the surface area and the volume.

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If Sa=2πrh+2π $r^{2}$ v=π $r^{2}h$ then the surface area is π $r^{2} h$ and volume is

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Keeping the term containing v at left side and take all other to right side.

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v=π $r^{2} h$ /2π $r^{2}$ -2πrh/2π $r^{2}$

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Learn more about surface area at brainly.com/question/16519513

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2 years ago

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Answer:

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3 years ago

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3 years ago

Read 2 more answers

!SUBSTITUTION METHOD!6y - 5z = -8 3z = -6 4x - 3y - 2z= 21​

!SUBSTITUTION METHOD!6y - 5z = -8 3z = -6 4x - 3y - 2z= 21