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3 years ago

For the equation -4y=8x what is the constant of variation

2 answers:

7 0

Direct Variation. Since k is constant (the same for every point), we can find k when given any point by dividing the y-coordinate by the x-coordinate. For example, if y varies directly as x , and y = 6 when x = 2 , the constant of variation is k = = 3 . Thus, the equation describing this direct variation is y = 3x .

Slav-nsk [51]3 years ago

6 0

The constant of variation is negative two.

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The width of a rectangular pool is 5 meters longer than the length. The perimeter of the pool is 58 meters. Use and equation to

garri49 [273]

The perimeter of a rectangular pool = 2l + 2w

If the width is 5m longer than the length,

Then Perimeter = 2(l + 5) + 2l
= 4l + 10 {THE EQUATION}

Since Perimeter = 58 m
Then 4l + 10 = 58 m

⇒ l = 12 m

Thus the Length of the Pool = 12 m

8 0

3 years ago

Plz help ASAP with explanation

Aleksandr-060686 [28]

Answer:

The height of the tank in the picture is:

19.5 cm

Step-by-step explanation:

First, to know the height of the tank, we're gonna change the unit of the volume given in liters to cm^3:

1 liter = 1000 cm^3

So:

1.2 liters = 1200 cm^3

Now, we must calculate the height of the tank that we don't know (the other part that isn't with water), to this, we can use the volume formula clearing the height:

Volume of a cube = long * wide * height

Now, we must clear the height because we know the volume (1200 cm^3):

Height = volume of a cube / (long * wide)

And we replace:

Height = 1200 cm^3 / (12 cm * 8 cm)
Height = 1200 cm^3 / (96 cm^2)
Height = 12.5 cm

Remember this is the height of the empty zone, by this reason, to obtain the height of the whole tank, we must add the height of the zone with water (7 cm) that the exercise give us:

Heigth of the tank = Height empty zone + height zone with water
Heigth of the tank = 12.5 cm + 7 cm
Heigth of the tank = 19.5 cm

In this form, we calculate the height of the tank in 19.5 cm.

6 0

3 years ago

Commutative (Order) Property of Addition

MissTica

Answer:

So the Commutative Property is the one that refers to moving stuff around, right.? So I guess for addition, the rule is "a + b = b + a"; in numbers, this means 2 + 3 = 3 + 2.

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3 years ago

Please help quick it would help a lot

liq [111]

Answer:

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3 years ago

Question 2 of 10

avanturin [10]

Answer:

Step-by-step explanation:

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3 years ago