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allochka39001 [22]

3 years ago

5

five daughter share a gift of $100. Each girl except the youngest gets $5 more than her next youngest sister. How much does the

youngest girl get?

1 answer:

Dvinal [7]3 years ago

4 0

Answer:

$10

Step-by-step explanation:

Let x be the amount the youngest sister gets

x + (x+5) + (x+10) + (x+15) + (x+20) = 100

5x + 50 = 100

5x = 50

x = 10

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Arrange the entries of matrix A in increasing order of their cofactors values

givi [52]

To find the cofactor of

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We cross out the Row and columns of the respective entries and find the determinant of the remaining $2\times 2$ matrix with the alternating signs.

$Ac_{11}=\left|\begin{array}{ccc}4&-1\\2&1\end{array}\right|$

$Ac_{11}=4\times 1- -1\times 2$

$Ac_{11}=4+ 2$

$Ac_{11}=6$

$Ac_{12}=-\left|\begin{array}{ccc}-7&-1\\-8&1\end{array}\right|$

$Ac_{12}=-(-7\times 1- -1\times -8)$

$Ac_{12}=-(-7- 8)$

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$Ac_{21}=-(5\times 1- 3\times 2)$

$Ac_{21}=-(5-6)$

$Ac_{21}=1$

$A_c{23}=-\left|\begin{array}{ccc}7&5\\-8&2\end{array}\right|$

$Ac_{23}=-(7\times 2 -8\times 5)$

$Ac_{23}=-(14-40)$

$Ac_{23}=26$

$A_c{31}=\left|\begin{array}{ccc}5&3\\4&-1\end{array}\right|$

$Ac_{31}=5\times -1 -4\times 3$

$Ac_{31}=-5-12$

$Ac_{31}=-17$

$A_c{33}=\left|\begin{array}{ccc}7&5\\-7&4\end{array}\right|$

$Ac_{33}=7\times 4- -7\times 5$

$Ac_{33}=28+35$

$Ac_{33}=63$

Therefore in increasing order, we have;

$Ac_{31}=-17,Ac_{21}=1,Ac_{11}=6,Ac_{23}=26,Ac_{12}=15, Ac_{33}=63$

7 0

3 years ago

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AND Use el adverbio TAN o una forma del adjetivo TANTO para formar frases de comparación. (1 point each, 4 points total) Ejemplo

dybincka [34]

Answer:

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ELLOS TIENEN TANTOS HIJOS COMO NOSOTROS.

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3 years ago

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Step-by-step explanation:

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2 years ago

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svetlana [45]

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