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3 years ago

Determine 3 solutions to this equation: 4x - 2y = 8.

1 answer:

4 0

I: 4x - 2y = 8
4 * 0 - 2y = 8
0 - 2y = 8
2y = 0 - 8
2y = -8
y = -8/2
y = -4

II: 4x - 2y = 8
4*2 - 2y = 8
8 - 2y = 8
2y = 8-8
2y = 0
y = 0/2
y = 0

III: 4x - 2y = 8
4 * (-1) - 2y = 8
-4 - 2y = 8
2y = -4-8
2y = -12
y = -12/2
y = -6

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Six times a number, increased by 3 is is 27. find the number

Mekhanik [1.2K]

Answer : The number is 4.

Step-by-step explanation:

Given : 

six times a number, increased by 3 is is 27.

To Find: 

The number.

Solution : 

Let the number is x

six times a number is 6x

Increased by 3 = 6x+3

According to the given question :

Solving the value x : 

6x+3 =27

6x = 27-3

6x = 24

x = 24/6

x = 4

Hence, the number is 4.

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3 years ago

5. (9r 3 + 5r 2 + 11r) + (-2r 3 + 9r - 8r 2)

ad-work [718]

Answer:

7r³ - 3r² + 20r

Step-by-step explanation:

(9r³ + 5r² + 11r) + (-2r³ + 9r - 8r²)

You can get rid of the parentheses since there is nothing to distribute.

9r³ + 5r² + 11r - 2r³ + 9r - 8r²

Combine like factors.

7r³ - 3r² + 20r

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2 years ago

Please help me

kirza4 [7]

This is a hexagonal prism: Volume = Area of Base (hexagon) x Height:
There are 6 equal equilateral triangles in a hexagone.
The apothem (or altitude of each triangle) = side x (√3)/2 =12(√3)/2 = 6√3
Area of ONE equilateral triangle = (side x altitude)/2:
Area of ONE equilateral triangle = (12 x 6√3)/2 = 36√3 ft²
Area of the SIX equilateral triangles = 36√3 x 6 = 216√3 ft²
VOLUME = BASE X HEIGHT = 216√3 x 15 = 3240√3 ft³

OR VOLUME = 5612 ft³

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3 years ago

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For my answer i got y = x - 18

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raketka [301]

Answer:

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2 years ago