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Hitman42 [59]
3 years ago
7

A box is to be constructed with a rectangular base and a height of 5 cm. If the rectangular base must have a perimeter of 28 cm,

which quadratic equation best models the volume of the box? V = lwh P = 2(l + w
Mathematics
2 answers:
Artyom0805 [142]3 years ago
7 0

Answer:

The quadratic y that best models the volume = 70L - 5L^2

Step-by-step explanation:

Since the formula for calculating the perimeter of a rectangle = 2(L+W) and the perimeter of the base of this box in question must be 28cm. We can always find the sum of the length and the width of the rectangular base.

2(L+W) = 28

L+W = 28/2

L + W = 14

The sum of the box's length and width width = 14cm.

Again, we were informed that the box must have a height no of 5cm. So to be able to have an idea of what its volume will be like, we will be needing the formula for calculating the volume of a cuboid which the box is. The formula for the volume is:

Length×width×height

Since the sum of the length and the width of the base of the box must be -

L + W = 14

We will then make "W"(width) the subject of the formula

L + W = 14

W = 14 - L

Now, we will substitute W for 14 - L in the formula for calculating the volume of a cuboid

Volume of a cuboid = L × W × H

Since h = 5cm then:

= L × (14 - L) × 5

= (14L - L^2) × 5

= 70L - 5L^2

Therefore, the quadratic equation that best models the volume of the box is = 70L - 5L^2

Svetradugi [14.3K]3 years ago
6 0

Answer:

The quadratic equation that best models the volume of the box (in terms of W) is:

70W-5W^2

Step-by-step explanation:

The perimeter of the rectangular base = 28cm

Perimeter of a rectangle = 2(L+W)

2(L+W)=28

L+W=14

L=14-W

Volume of the Box= LWH

Since L=14-W and Height Of the Box= 5cm

Volume of the Box= (14-W)W X 5

=5(14W-W^2)\\                             =70W-5W^2

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telo118 [61]

Answer:

1) 2 5/12

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5) b = -27

Step-by-step explanation:

1) You may be expected to solve this a different way, but how I prefer to solve these involves converting to "improper fractions", then making everything whole.

-11/3 = x - 5/4 (convert to improper fractions)

-44 = 12x - 15 (multiply everything by 12 to get whole numbers)

-29 = 12x (add 15 to both sides)

-29/12 = x (divide both sides by 12)

2 5/12 = x (convert to a mixed number, because that's what the question asks)

For clarity, that's two and five twelfths.

2) Same thing as above. I prefer improper fractions.

x + 17/6 = -1/5 (simplify and convert to improper fractions)

30x + 85 = -6 (multiply everything by 30 to get whole numbers)

30x = -91 (subtract 85 from both sides)

x = -91/30 (divide both sides by 30

x = -3 1/30 (convert to a mixed number, because that's what the question asks)

For clarity, thats minus/negative three and one thirtieth.

3) Same thing as above.

-(11/3)x = -11/5

-55x = -33

55x = 33

x = 33/55

x = 3/5

4) Same as above, but it's multiple choice! Yay!

-3m = 84

m = -28

5) You know the drill.

-b = 27

b = -27

I'd be happy to explain more if you need it at all. I'd recommend that next time this comes up, you post just one problem and see if you can understand the method so you can better learn how to do it on your own. Good luck (:

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iris [78.8K]

Answer:

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Problem:

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Step-by-step explanation:

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So we have

xy-3=(x-1)×(y)+remainder

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Now we just need to figure out what polynomial goes in for the remainder so this will be a true identity.

We need to get rid of minus y so we need plus y in the remainder.

We also need minus 3 in the remainder.

So the remainder is y-3.

Let's try it out:

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xy-3=xy-3 is what we wanted so we are done here.

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3 years ago
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azamat

Answer:

The answer is 84

Step-by-step explanation:

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Help me will give brainliest
vovangra [49]

Answer:

The first option is correct, 12/30 and 25/30

Step-by-step explanation:

To get common denominators, you need to find the GFC (greatest common factor) of 5 and 6, which is 30. Then you would need to make the fractions equal the same as the original fractions, by multiplying.

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