A system of equations consists of the two equations shown.

Mathematics

1 answer:

RideAnS [48]3 years ago

3 0

Answer:

Multiply the first equation by 18; multiply the second equation by 18; add the equations.

Multiply the first equation by − 6; multiply the second equation by 4; add the two equations.

Multiply the first equation by 3; multiply the second equation by − 2;add the two equations.

Step-by-step explanation:

All of these procedures work because they are canceling out the x and y values in both equations.

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A right cone has a radius of 13 cm and a slant height of 20 cm. Find its surface area.

devlian [24]

Answer:

$A=1347.7\ cm^2$

Step-by-step explanation:

Given that,

Radius of a cone, r = 13 cm

Slant height of the cone, l = 20 cm

We need to find the surface area of the cone. The formula for the surface area of the cone is given by :

$A=\pi rl +\pi r^2$

Put all the values,

$A=\pi r(l + r)\\\\A=\pi \times 13(20 + 13)\\\\A=1347.7\ cm^2$

So, the surface area of the cone is $1347.7\ cm^2$ .

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Answer:

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Step-by-step explanation:

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