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Y_Kistochka [10]
3 years ago
8

Helpppppppp plssssdds

Mathematics
1 answer:
sashaice [31]3 years ago
4 0

Answer:

A. 8.008, 8.08, 8.081, 8.09

B. 14.200, 14.204, 14.210, 14.240

Step-by-step explanation:

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Solve for x in the equation 2x^2-4x-9=29
Andrews [41]

Answer:

x = 1  ±2sqrt(5)

Step-by-step explanation:

2x^2-4x-9=29

Add 9 to each each side

2x^2-4x-9+9=29+9

2x^2-4x=38

Divide by 2

2/2x^2-4/2x=38/8

x^2 -2x =19

Complete the square

x^2 -2x + (-2/2)^2 = 19 +(-2/2)^2

x^2 -2x +1 = 19+1

(x-1)^1=2 = 20

Take the square root of each side

sqrt((x-1)^2) = ±sqrt(20)

x-1 =  ±sqrt(20)

Add 1 to each side

x-1+1 = 1  ±sqrt(20)

x = 1 ±sqrt(20)

Simplifying the square root of 20

x = 1  ±sqrt(4)sqrt(5)

x = 1  ±2sqrt(5)

3 0
3 years ago
I really need help finding the solution!!
Mrac [35]

Answer:

-0.5 is not a solution

2 is a solution

Step-by-step explanation:

To check if something is a solution of the equation, you need to substitute the value in place of the variable

15 + 2y = -12 - 4y

15 + 2(-0.5) = -12 - 4(-0.5)

15 - 1 = -12 + 2

14 ≠ -10 ∴ -0.5 is not a solution

5 - 2(3x + 5) = 3 - 10x

5 - 2[3(2) + 5] = 3 - 10(2)

5 - 2(6 + 5) = 3 - 10(2)

5 - 12 - 10 = 3 - 120

-17 = -17 ∴ 2 is a solution

3 0
3 years ago
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4 0
3 years ago
Quadrilateral LMNP has been translated to<br> form quadrilateral TVWY. What is the length<br> of YW?
Komok [63]

Answer:

f(x)=4x^3-5

Step-by-step explanation:

7 0
3 years ago
How many cubic feet of dirt are there in a hole that is 3’ deep x 3’ wide x 3’ long?.
Svetllana [295]

Answer:

27

depth ×breadth×width=3×3×3

= 27

8 0
2 years ago
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