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3 years ago

2x-4y=20 what is the value of y

Mathematics

2 answers:

ra1l [238]3 years ago

6 0

Answer: 20-2x/-4

Step-by-step explanation:

To actually solve for y as a number, you need two equations.

For this case move the 2x to the other side, making the equation -4y=20-2x.

Then divide by -4 on each side making the equation y=20-2x/-4.

Phantasy [73]3 years ago

5 0

Answer:

y = 20-2x /-4

Step-by-step explanation:

Given 2x - 4y =20

y ?

Subtract 2x from both sides of the equation

2x - 2x -4y = 20 - 2x

-4y = 20 - 2x

Divide both sides by -4

-4y/-4 = 20-2x / -4

y = 20-2x /-4

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(3x-2y)(3x+2y)

Step-by-step explanation:

Proof:

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Answer:

The given point A (6,13) lies on the equation. True

The given point B(21,33) lies on the equation. True

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Step-by-step explanation:

Here, the given equation is : $y =\frac{4}{3} x + 5$

Now,check the given equation for the given points.

1) A (6,13)

Substitute x = 6 in the given equation $y =\frac{4}{3} x + 5$

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2) B (21,33)

Substitute x = 21 in the given equation $y =\frac{4}{3} x + 5$

$y =\frac{4}{3} (21) + 5 = 4(7) + 5 = 28 + 5 = 33$

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Hence, the given point B(21,33) lies on the equation.

3) C (99, 137)

Substitute x = 99 in the given equation $y =\frac{4}{3} x + 5$

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3 years ago

Read 2 more answers

Select the expression that simplifies to 1 / x^1/8

Troyanec [42]

Answer:

$\left(\displaystyle \sqrt[3]{x^{-\tfrac 35}}\right)^{\tfrac 58}$

Step-by-step explanation:

$\left(\displaystyle \sqrt[3]{x^{-\tfrac 35}}\right)^{\tfrac 58}\\\\\\=\left[ \left(\displaystyle x^{-\tfrac 35} \right)^{\tfrac 13 \right]^{\tfrac 58}\\\\\\=\left( \displaystyle x^{-\tfrac 35}\right)^{\tfrac 5{24}}\\\\\\=x^{ \displaystyle -\tfrac{3}{24} \right}\\\\\\=x^{\displaystyle -\tfrac 18 }\\\\\\=\dfrac 1{x^{\tfrac 18}}$

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