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sergey [27]
2 years ago
11

This is quadratic equations Help asap!!

Mathematics
1 answer:
lord [1]2 years ago
3 0

Answer:

x = - 3 ± \sqrt{2}

Step-by-step explanation:

x² + 6x + 7 = 0 ( subtract 7 from both sides )

x² + 6x = - 7

using the method of completing the square

add ( half the coefficient of the x- term )² to both sides

x² + 2(3)x + 9 = - 7 + 9

(x + 3)² = 2 ( take square root of both sides )

x + 3 = ± \sqrt{2} ( subtract 3 from both sides )

x = - 3 ± \sqrt{2}

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Explain how to determine the smaller of 0.24 and 0.3 using the number line.
ololo11 [35]
0.24 is smaller than 0.3 because as you approach zero from the right, there's less distance from 0.24 to 0 than 0.3. Think of this in terms of limits.
3 0
3 years ago
se quiere pintar una pared en forma de hexágono regular y se sabe que cada lado mide 3m y que su apotema es de 2,8m cual es el a
qwelly [4]

Answer:

El área total a pintar será:

A_{tot}=25.2\: m^{2}

Step-by-step explanation:

Sabiendo el apotema y la longitu de los lados, podemos encontrar el área de un triangulo. Recordemos que, si trazamos rectas del centro del hexágono a los vértices, se formaran 6 triángulos equiláteros.

El área de un triángulo es:

A_{t1}=\frac{b*a}{2}

b es la longitud de la base (b=3 m)

a es la apotema, osea la altura del triangulo (a = 2.8)

A_{t1}=\frac{2.8*3}{2}

A_{t1}=4.2\: m^{2}

Ahora, solo debemos mutiplicar ese valor por 6 para determianr el área total de la pared.

A_{tot}=25.2\: m^{2}

Espero te haya sido util!

5 0
3 years ago
Given the Coordinate Rule (x + 2, y - 3), where would point (4, 7) translate to?
GaryK [48]

Answer:

(6,4)

Step-by-step explanation:

(x+2,y-3)

=(4+2,7-3)

=(6,4)

3 0
3 years ago
Read 2 more answers
What is the equation of this graphed line?
Doss [256]

Answer:

-4x-6y=2x+6y

Step-by-step explanation:


4 0
3 years ago
What is 3√125x^12<br><br> A) 5x^2<br> B) 5x^4<br> C) 25x^2<br> D) 25x^4
Schach [20]
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5 0
3 years ago
Read 2 more answers
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