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3 years ago

Difference between 1/9 and 1/2

Mathematics

2 answers:

vovikov84 [41]3 years ago

7 0

Answer:

-7/18

Step-by-step explanation:

By add or subtracting fractions, you need to equalize the denominator.

To transform all denominators of 1/9 an 1/2 to the single value of 18, their LCM, we multiply a fraction by x/x where x=LCMy, where y is the denominator of the fraction being transformed.

In this case:

1/9 *2/2 = 2/18

1/2 *9/9 = 9/18

So the difference between 1/9 and 1/2

1/9 - 1/2

2/18 - 9/18

-7/18

Taya2010 [7]3 years ago

3 0

Answer:

7/18

Step-by-step explanation:

To find the difference between numbers, subtract. Since we have fractions, we need a common denominator to be able to subtract.

The LCD of 2 and 9 is 2 * 9 = 18

18/2 = 9

18/9 = 2

1/2 - 1/9 = (9 * 1)/(9 * 2) - (2 * 1)/(2 * 9) = 9/18 - 2/18 = 7/18

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Solnce55 [7]

Solution :

Given :

$n_1 = n_2 = 40$

$\overline X_1 = 18$

$S_1 = 4$

$\overline X_2 = 12$

$S_2 =10$

So we want to test :

$H_0 : \mu_1=\mu_2$ vs $H_1 : \mu_1 \neq \mu_2$

a). For 98% confidence interval :

$=\left((\overline X_1 - \overline X_2) \pm Tn_1+n_2-2, \alpha / 2 \sqrt{\frac{s_1^2}{n_1}+\frac{s_2^2}{n_2}}\right)$

$=\left((18-12) \pm 2.375 \sqrt{\frac{4^2}{40}+\frac{10^2}{40}}\right)$

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= (1.956, 10.045)

7 0

3 years ago

Can someone do this for me please

nlexa [21]

Answer:

Step-by-step explanation:

2(2+3) =9+1

let me know if you get it right

5 0

3 years ago

Solve the system by either substitution or elimination<br> X-3y-3z=9<br> 5x-3y+3z=-3<br> -4x+2y-4z=4

zlopas [31]

X - 3y - 3z = 9
5x - 3y + 3z = -3
--------------------add
6x - 6y = 6

x - 3y - 3z = 9.....multiply by -4
-4x + 2y - 4z = 4..multiply by 3
-------------------
-4x + 12y + 12z = -36 (result of multiplying by -4)
-12x + 6y - 12z = 12 (result of multiplying by 3)
-----------------add
-16x + 18y = - 24

6x - 6y = 6.....multiply by 3
-16x + 18y = -24
---------------------
18x - 18y = 18 (result of multiplying by 3)
-16x + 18y = -24
--------------------add
2x = - 6
x = -6/2
x = -3

6x - 6y = 6
6(-3) - 6y = 6
-18 - 6y = 6
-6y = 6 + 18
-6y = 24
y = -24/6
y = -4

x - 3y - 3z = 9
-3 - 3(-4) - 3z = 9
-3 + 12 - 3z = 9
9 - 3z = 9
-3z = 9 - 9
-3z = 0
z = 0

so ur solution is (-3,-4,0)

4 0

3 years ago

Four witches are making a brew.Patricia puts in x frogs legs.sheila puts in five more than patricia.Anne puts double the amount

prohojiy [21]

Answer:

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Step-by-step explanation:

Given Patricia puts in x frogs legs, then

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Anne puts in 2(x + 5) ( double the amount of Anne )

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