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3 years ago

7(3x+-9) what is the answer

Mathematics

2 answers:

Sidana [21]3 years ago

7 0

Answer:

21x-63

Step-by-step explanation:

morpeh [17]3 years ago

3 0

Answer: 21x - 63

explanation:

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PLEASE HELP 2 QUESTIONS 45 POINTS!!!!!!!!!

Effectus [21]

Answer:

1. -8x² - 16x - 6 a = -8, b = -16, c = -6

1. 4x² - 1 a = 4, b = 0, c = -1

Step-by-step explanation:

use the 'foil' method:

(4x + 2)(-2x - 3)

F: -8x² O: -12x I: -4x L: -6

-8x² - 16x - 6

(2x + 1)(2x - 1)

F: 4x² O: -2x I: 2x L: -1

4x² - 1

5 0

3 years ago

I need help with this please help me

Fofino [41]

Answer:

$+ \times + = + \\ - \times - = + \\ - \times + = - \\ + \times - = -$

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4 years ago

What is the value of value of 5/6 ÷ 3/4?

Evgesh-ka [11]

Answer:

answer is 10/9

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I hope it helps you

4 0

3 years ago

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Please help me with all the questions on both attachments.

Strike441 [17]

I am going to go on a limb here and say that C, or the third one is incorrect. I would love to say it is A, or the first one, but i'm not completely sure, if it's wrong I am really sorry!

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3 years ago

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Six pyramids are shown inside of a cube. The height of the cube is h units. Six identical square pyramids can fill the same volu

MAXImum [283]

Answer:

(A)The height of each pyramid is One-half h units.

Step-by-step explanation:

Height of the Cube = h units

Volume of the Cube $=h^3 $ cubic units$

If Base of the cube =Base of the square pyramid

Base of the square pyramid = h units

$\text{Volume of a Pyramid}=\dfrac{1}{3}*Base Area*Height$

$\text{Volume of One Pyramid}=\dfrac{1}{3}*h^2*Height$

$\text{Volume of Six Pyramids}=6*\dfrac{1}{3}*h^2*Height\\=(2h^2*Height)\:cubic\:units$

Since Volume of the Cube = Volume of Six Square Pyramids

Then:

$2h^2*Height=h^3\\Height=\dfrac{h^3}{2h^2} \\$Height of each pyramid =\dfrac{1}{2}h \:Units$

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4 years ago

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