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2 years ago

B. Choose the correct answers.

1 answer:

5 0

The answer is always negative because if you multiply like signs, the answer is positive, unlike signs are always negative

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Write the answer to each problem in terms of the variable.

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(34 - R) will be the <span>expression of the other number</span>.

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3 years ago

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Answer:

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Step-by-step explanation:

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3 years ago

two trains leave the station at the same time, one heading west and the other east. the westbound train travels at 80 miles per

jekas [21]

Answer:

let this happens after t hours

80t + 60t = 392

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2 years ago

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Bogdan [553]

Answer

First factor Second factor

1 45

3 15

5 9

Step-by-step explanation:

So in order to find the factors, you might need to multiply or divide.

1 * 45 = 45

3 * 15 = 45

5 * 9 = 45

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3 years ago

Find the surface area and volume of cone. A = rs + r2 V = 1/3r2 h A cone's slant height (s) is 14 cm and its radius is 4.5 cm. S

Reptile [31]

Answer:

Surface area = $261.6cm^2$

Volume = $281.2cm^3$

Step-by-step explanation:

To find the surface area of our cone, we are using the formula for the surface area of a cone:

$A=\pir(r+\sqrt{h^2+r^2} )$

where

$A$ is the surface area

$r$ is the radius

$h$ is the height

Notice that the height, radius, and slant height make a right triangle, so to find the height, $h$ , we can use the Pythagorean theorem:

$s^2=r^2+h^2$

$14^2=4.5^2+h^2$

$196=20.25+h^2$

$h^2=196-20.25$

$h^2=175.75$

$h=\sqrt{175.75}$

$h=13.26$ cm

We have all we need now to find the surface area of our cone:

$A=\pir(r+\sqrt{h^2+r^2} )$

$A=\pi(4.5)(4.5+\sqrt{13.26^2+4.5^2} )$

$A=261.6cm^2$

Now, to find the volume of our cone, we are using the formula for the volume of a cone:

$V=\frac{\pi r^2h}{3}$

where

$V$ is the volume

$r$ is the radius

$h$ is the height

Replacing values

$V=\frac{\pi (4.5^2)(13.26)}{3}$

$V=281.2cm^3$

We can conclude that the surface area of our cone is 261.6 square centimeters and its volume is 281.2 cubic centimeters.

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3 years ago

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