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podryga [215]
3 years ago
12

Please help help help help help help​

Mathematics
1 answer:
nevsk [136]3 years ago
7 0

Answer:

y is equal to (-1/4)x

hope this helped! :)

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(04.01)The Baldwin family walked 4/5 of a mile in 4/9 of an hour. What is their unit rate in miles per hour?
sertanlavr [38]
Hello!

Since we know how much they walked in 4/9 of an hour, we will divide 4/5 by 4/9 to get 4/9 to one.

\frac{4}{5}÷\frac{4}{9}=\frac{36}{20} =  \frac{9}{5}

They went 1 4/5 mph or 1.8 mph.

I hope this helps!
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77%<br> Calculate the area of this triangle.<br> 14 cm<br> 11 cmi<br> 18 cm
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Answer:

A = 99 cm²

Step-by-step explanation:

The area (A) of a triangle is calculated as

A = \frac{1}{2}  bh ( b is the base and h the perpendicular height )

Here b = 18 and h = 11 , then

A = \frac{1}{2} × 18 × 11 = 9 × 11 = 99 cm²

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What part of 15 is 3
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A toy company is considering a cube or sphere-shaped container for packaging a new product. The height of the cube would equal t
Darya [45]

Answer:

Packaging with cube will be more efficient.

Step-by-step explanation:

Given:

A cube and a sphere where the diameter of the sphere is equal to the height of the cube.

Let the height of the cube "x"

Radius of the sphere =  (\frac{x}{2})

Formula to be used:

Surface area of the cube = 6x^2 and Surface area of the sphere = 4\pi (r)^2

Volume of the cube = x^3 and Volume of the sphere = \frac{4\pi r^3}{3}

We have to compare the ratio of SA and Volumes.

Ratio of SA :                                        Ratio of their volumes :

⇒ \frac{SA\ of\ cube\ (S_1)}{SA\ of\ sphere\ (S_2)}                            ⇒ \frac{Volume \ of \ cube\ (V_1)}{Volume\ of\ sphere\ (V_2)}

⇒ \frac{6x^2}{4\pi (\frac{x}{2})^2}                                           ⇒ \frac{x^3}{\frac{4 \pi r^3}{3} }

⇒ \frac{6x^2}{4\pi (\frac{x^2}{4})}                                           ⇒ \frac{x^3}{\frac{4 \pi (\frac{x}{2})^3}{3} }

⇒ \frac{6x^2}{\pi x^2}                                               ⇒  \frac{x^3}{\frac{4 \pi (\frac{x^3}{8})}{3} }

⇒ \frac{6}{\pi}                                                  ⇒ \frac{6}{\pi}

⇒ approx 2                                     ⇒  approx 2

⇒ S_1=2S_2                                      ⇒ V_1=2V_2

Packaging of the toy with the cube will be more efficient as it has more volume comparatively.

5 0
3 years ago
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