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mixas84 [53]
3 years ago
10

PLS HELP ASAP WILL MARK BRAINLIEST

Mathematics
2 answers:
Rudik [331]3 years ago
4 0

Answer:

k = - 12.56 or k = 0.56

Step-by-step explanation:

Given

k² + 12k = 7

To complete the square

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

k² + 2(6)k + 36 = 7 + 36, that is

(k + 6)² = 43 ( take the square root of both sides )

k + 6 = ± \sqrt{43} ( subtract 6 from both sides )

k = - 6 ± \sqrt{43}, thus

k = - 6 - \sqrt{43} ≈ - 12.56 or k = - 6 + \sqrt{43} ≈ 0.56

Lady_Fox [76]3 years ago
3 0
Yes he will



Because math is cool
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Is -0.3 a rational number? is 3.14144144414444... a rational number?
Ainat [17]

I will try to make this as simple as possible.

First off, we need to know what a rational number is: A rational number is any number that can be made by dividing 2 integers. For example:

1.5 would be a rational number because 1.5 = 3/2 (3 and 2 are both integers)

With that being said, let's begin.

First off, let's start with -0.3, let's ask ourselves, can we make this number by dividing 2 integers, the answer is yes, we can, by doing \frac{-3}{10} we have the equivalent of -0.3, so now we know it's a rational number.

As for the second one, it can't be a rational number because it can't be made by dividing to integers, so the answer is:

-0.3 is a rational number, but 3.14144144414444 is not.

Hope this helped! c:

3 0
3 years ago
( 19, 6), (15. 16). what is the slope?
Brrunno [24]

Answer:

-5/2

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5 0
2 years ago
Help plz I will give brainliest!!!
Eduardwww [97]
I think c would be the correct answer
3 0
2 years ago
In the triangle below, find the measurements of the unknown angles.
LUCKY_DIMON [66]

Answer:

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Step-by-step explanation:

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Step 1: Set up equation

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Step 2: Combine like terms

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Step 3: Subtract 75 on both sides

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Step 4: Divide both sides by 3

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So 1 angle is 35°

Step 5: Plug in <em>a</em> to find last angle

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7 0
3 years ago
after spending 80% of her daily allowance, Ola found out she had 25k left. How much was her total allowance?
Anestetic [448]

Answer:

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80 %   *  x = 25 k

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x   = 25 k / .80 = 31.25 k

8 0
1 year ago
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