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2 years ago

Balance the following : K + H20----------> KOH +H2please help fast I'm giving an exam

Mathematics

1 answer:

Elza [17]2 years ago

7 0

Step-by-step explanation:

2K + 2H2O ➡ 2KOH + H2

Hope it helps :)

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Factor completely. 5x^2+44x-9

Leni [432]

Answer:

(x + 9)(5x - 1)

Step-by-step explanation:

Given

5x² + 44x - 9

Consider the factors of the product of the coefficient of the x² term and the constant term which sum to give the coefficient of the x- term.

product = 5 × - 9 = - 45 and sum = + 44

The factors are + 45 and - 1

Use these factors to split the x- term

5x² + 45x - x - 9 ( factor the first/second and third/fourth terms )

= 5x(x + 9) - 1(x + 9) ← factor out (x + 9) from each term

= (x + 9)(5x - 1) ← in factored form

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3 years ago

2x +8= 3x-4 what is x equal two

notka56 [123]

Answer:

x= 12

Step-by-step explanation:

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3 years ago

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The table represents a linear function. Write a rule for this function in the

dangina [55]

Answer:

function is f(x) = x+6

and the missing outputs are 19, 24 and 27

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3 years ago

PLEASE HELP!! I WILL BRAINLIEST

ArbitrLikvidat [17]

Answer:

81.8%

Step-by-step explanation:

Mean = $\mu = 40$

Standard deviation = $\sigma = 5$

Now we are supposed to find out what percent of the numbers fall between 35 and 50

$z = \frac{x-\mu}{\sigma}$

Substitute the values

$z = \frac{x-40}{5}$

Now for P(35<x<50)

Substitute x = 35

$z = \frac{35-40}{5}$

$z =-1$

Substitute x = 50

$z = \frac{50-40}{5}$

$z =2$

So, P(-1<z<2)

P(z<2)-P(z<-1)

=0.9772-0.1587

=0.8185

= $0.818 \times 100$

=81.8%

Hence 81.8% percent of the numbers fall between 35 and 50

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3 years ago

2. To which set or sets does the number -14

zhuklara [117]

It is d im pretty sure

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3 years ago

Balance the following : K + H20----------> KOH +H2please help fast I'm giving an exam​

Balance the following : K + H20----------> KOH +H2please help fast I'm giving an exam