3 years ago

A: x ≤ 6 B: x ≥ 8 C: x ≥ – 8 D: x ≤ – 8

Mathematics

1 answer:

ASHA 777 [7]3 years ago

6 0

Answer:

I believe the answer you are looking for is C

Step-by-step explanation:

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Answer:

38000(Rounded to nearest 100)

Step-by-step explanation:

2018-2006=12 30000X1.02^12 =38047.2538

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Noah and Kate's are shopping for new guitar strings in a music store Noah buys two packs of strings Kate buys two packs of strin

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The sum of two consecutive cube numbers is 341. Work out the two numbers. (2 marks)

Kobotan [32]

Answer:

63 and 53

Step-by-step explanation:

you could use trail and error. So:

13+23=9

33+43=91

63+73=559

53+63=341

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3 years ago

In a mixture of concrete, there are five lb of cement mix for each pound of gravel. if the mixture contains a total of 198 lb o

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2 years ago

Find the value of k and x2<br> x^2+ 13x + k = 0, x1=-9

Anarel [89]

Given:

The quadratic equation is:

$x^2+13x+k=0$

$x_1=-9$

To find:

The value of k and $x_1$ .

Solution:

We have,

$x^2+13x+k=0$ ...(i)

Putting $x=-9$ , we get

$(-9)^2+13(-9)+k=0$

$81-117+k=0$

$-36+k=0$

$k=36$

Putting $k=36$ in (i), we get

$x^2+13x+36=0$

Splitting the middle term, we get

$x^2+9x+4x+36=0$

$x(x+9)+4(x+9)=0$

$(x+9)(x+4)=0$

$x=-9,-4$

Here, $x_1=-9$ and $x_2=-4$ .

Therefore, the required values are $k=36$ and $x_2=-4$ .

3 0

2 years ago