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Sati [7]
3 years ago
6

Factorise: k² - 2k - 8with explaining the steps ​

Mathematics
2 answers:
scoundrel [369]3 years ago
8 0

Answer:

( k-4)(k+2)

Step-by-step explanation:

k² - 2k - 8

What 2 numbers multiply to -8 and add tp -2

-4*2 = -8

-4+2 = -2

( k-4)(k+2)

Burka [1]3 years ago
7 0

Refer to the attachment for steb-by-step explanation.

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Divide 2 over 3 ÷ 1 over 6 = ____.
Ad libitum [116K]

\frac{2}{3}  \div  \frac{1}{6}
{is the same as / equal to:}
\frac{2}{3}  \times  \frac{6}{1}  \\  =  \frac{2}{3}  \times 6 \\  =  \frac{2 \times 6}{3}  \\  =  \frac{12}{3}
{Simplify the fraction to become:}
= 12 \div 3 \\  = 4

Hope this helps! :)
6 0
3 years ago
carl shades a row in the multiplication table, the products in the row are all event, the ones digits in the products repeat 0,4
FinnZ [79.3K]

The <em>correct answer</em> is:

The 4's row.

Explanation:

The even rows in a the multiplication chart are the 2's, 4's, 6's, 8's, 10's, and 12's.

In the 2's row, we have: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24. Looking at the ones digits, we do not have the correct pattern.

In the 4's row, we have: 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48. This is the correct pattern (starting with 4): 4, 8, 2, 6, 0, 4, 8, 2, 6, etc. This is the correct row.

4 0
3 years ago
Read 2 more answers
6÷258 using partial quotient
Rom4ik [11]
43 6 goes into 25 4 times equaling 24 put the 1  carry down thw 8 6 time 3 is 18 that's 43 
7 0
3 years ago
Read 2 more answers
Given the following formula, with A = 27 and t = 3, solve for r.
Vikki [24]

Answer:

c.

Step-by-step explanation:

7 0
3 years ago
Ecuación de la hipérbola con centro en (0;0), focos en abrir paréntesis 0 coma espacio menos raíz cuadrada de 28 cerrar paréntes
yaroslaw [1]

Answer:

\frac{y^{2}}{25}-\frac{x^{2}}{3}=1

Step-by-step explanation:

Para resolver este problema debemos tomar en cuenta los datos que nos dan y la ecuación de una hipérbola. Comencemos con los datos:

centro: (0,0)

focos: (0,-\sqrt{28}),(0,\sqrt{28})

eje conjugado = 2\sqrt{3}

por los focos podemos ver que la hipérbola se dirige hacia el eje y, por lo que debemos tomar la siguiente forma de la ecuación de la parábola:

\frac{y^{2}}{a^{2}}+\frac{x^{2}}{b^{2}}=1

de los focos podemos obtener que:

c=\sqrt{28}

y del eje conjugado podemos saber que al dividir la longitud del eje conjugado dentro de 2 obtenemos b, así que:

b=\sqrt{3}

podemos utilizar la siguiente fórmula para obtener a:

c^{2}-a^{2}=b^{2}

si despejamos a en la ecuación obtenemos lo siguiente:

a=\sqrt{c^{2}-b^{2}}

ahora podemos sustituir los valores:

a=\sqrt{(\sqrt{28})^{2}-(\sqrt{3})^{2}}

a=\sqrt{28-3}

a=\sqrt{25}

a=5

así que media vez conozcamos a, podemos sustituir los datos en la ecuación de la hipérbola así que obtenemos lo siguiente:

\frac{y^{2}}{a^{2}}+\frac{x^{2}}{b^{2}}=1

\frac{y^{2}}{(5)^{2}}+\frac{x^{2}}{(\sqrt{3})^{2}}=1

\frac{y^{2}}{25}+\frac{x^{2}}{3}=1

si graficamos la hipérbola, queda como en el documento adjunto.

7 0
3 years ago
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