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3 years ago

What is the product? - 2 5 5 [42] 7 22 18 ( 22 18 1 18

Mathematics

1 answer:

AysviL [449]3 years ago

3 0

Answer:

the answer is D.

Step-by-step explanation:

multiply each row in the first matrix by each column in the second matrix.

[4*-2+2*7 4*5+2*-1]

simplify each element of the matrix by multiplying out all the expressions.

[6 18]

this matrix is already in the most simplified form.

[6 18]

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The answer is: parent function

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Answer:

Part 1) The volume of the paperweight is $576\ cm^{3}$

Part 2) The total surface area of the paperweight is $400\ cm^{2}$

Step-by-step explanation:

Part 1) what is the volume of the paperweight?

we know that

The volume of the paperweight is equal to the volume of the square pyramid plus the volume of the cube

step 1

Find the volume of the pyramid

The volume of the pyramid is equal to

$V=\frac{1}{3}BH$

where

B is the area of the square base

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$H=3\ cm$

substitute

$V=\frac{1}{3}(64)(3)=64\ cm^{3}$

step 2

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The volume of the cube is equal to

$V=b^{3}$

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step 3

Find the volume of the paperweight

$64\ cm^{3}+512\ cm^{3}=576\ cm^{3}$

Part 2) what is the total surface area of the paperweight?

we know that

The total surface area of the paperweight is equal to the surface area of 5 faces of the cube plus the lateral area of the pyramid

step 1

Find the surface area of 5 faces of the cube

$SA=5b^{2}$

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step 2

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$LA=4[\frac{1}{2}bh]$

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step 3

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$320\ cm^{2}+80\ cm^{2}=400\ cm^{2}$

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3 years ago

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Answer:

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x = 5/2 , or -5/2

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What is the product? - 2 5 5 [42] 7 22 18 ( 22 18 1 18​

What is the product? - 2 5 5 [42] 7 22 18 ( 22 18 1 18