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3 years ago

2. Use an area model to explain 2.7x4.

Mathematics

1 answer:

Readme [11.4K]3 years ago

7 0

Answer:

this is there is given by Rishabh Raj

Step-by-step explanation:

model 2.7 x 4 product of means product of extreme then explain form standard form answer is 48 follow

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-8-x=x - 4x<br> Plis help me!!

Makovka662 [10]

Answer:

x = 4

Step-by-step explanation:

Given

- 8 - x = x - 4x, that is

- 8 - x = - 3x ( add 3x to both sides )

- 8 + 2x = 0 ( add 8 to both sides )

2x = 8 ( divide both sides by 2 )

x = 4

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4 years ago

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A student is asked to find the length of the hypotenuse of a right triangle. The length of one leg is 36 centimeters, and the l

DochEvi [55]

Answer:

45.6 cm

Step-by-step explanation:

Let X be the hypotenuse.

(36)^2 + (28)^2 = X^2

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2 years ago

What's -8(2)-[3(-5)-(-1)+4(2-6)]+4(-7)

frozen [14]

Answer:

-14

Step-by-step explanation:

-8(2)-[3(-5)-(-1)+4(2-6)]+4(-7)

opening the brackets

-8(2)-[-15+1+4(-4)]+4(-7)

-8(2)-[-15+1+4(-4)]+(-28)

-8(2)-[-15+1+(-16)]-28

-16-[-15+1+-16]-28

-16-[-15-16+1]-28

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3 years ago

Rudik [331]

Answer:

The ratio of their volumes is: $\frac{729}{64}$

Step-by-step explanation:

If the cones are similar, then the ratio of their heights should equal the ratio of their radiuses. If we call R the radius of the larger cone (the one of height 9 cm) and r the radius of the smaller cone (the one of height 4 cm), then the following proportion should be verified:

$\frac{R}{r} =\frac{9}{4} \\R=\frac{9\,r}{4}$

where we have solved for "R" in terms of "r".

Now we input this information in the formula for the volume (V) of the largest cone, and for the volume (v) of the smaller cone, recalling that the volume of a cone is the product of the area of the cone's circular base ( $\pi *\,radius^2$ ).

$v=\frac{\pi\,r^2\,4\,}{3} =\pi r^2\,\frac{4}{3} \\V=\frac{\pi\,R^2\,9}{3}=\frac{\pi\,(\frac{9\,r}{4} )^2\,9}{3}=\frac{\pi\,r^2\,729}{16*3}=\pi r^2\,\frac{243}{16}$

So now the ratio of their volumes (V/v) can be obtained:

$\frac{V}{v} =\frac{\frac{243}{16}}{\frac{4}{3}} =\frac{729}{64}$

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