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3 years ago

11

Last week Justin and his roommates ate 1/3 of a carton of yogurt, and this week they ate 5/6 of a carton. How much more yogurt d

id they eat this week compared to last week?

1 answer:

stepladder [879]3 years ago

6 0

They are 3/5 more compared to last week.

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

givi [52]

To find the cofactor of

$A=\left[\begin{array}{ccc}7&5&3\\-7&4&-1\\-8&2&1\end{array}\right]$

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.

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

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

$Ac_{11}=4+ 2$

$Ac_{11}=6$

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

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

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

$Ac_{12}=15$

$Ac_{21}=-\left|\begin{array}{ccc}5&3\\2&1\end{array}\right|$

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

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

$Ac_{21}=1$

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

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

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

$Ac_{23}=26$

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

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

$Ac_{31}=-5-12$

$Ac_{31}=-17$

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

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

$Ac_{33}=28+35$

$Ac_{33}=63$

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

Read 2 more answers

1. Rewrite the expression. Use an exponent, rather than repeated multiplication. (–4)(–4)

AlekseyPX

-4^2 is the same as -4*-4

-4*-4=16

-4^2= 16

-4^2 is the exponent.

I hope this helps!
~kaikers

4 0

3 years ago

X+y=1212<br> x-y=518 <br> please help me with it

Murljashka [212]

Here,

x+y=1212•••••• $\bold{equation~I }$
x-y=518•••••• $\bold{equation~II }$

ADDITIONALL,both two equation.

we get that,

x+y+x-y=1212+518
2x=1730
x=865

so,

x-y=518
865-y=518
y=860-518
y=347

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3 years ago

How many times are equal to 40000 pounds

Usimov [2.4K]

1 pound × 40,000 = 40,000 pounds.

Please mark as brainliest. I really need it.

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IrinaK [193]

D. 4, -3 Because you plug in 4 for the x and 2•4 is 8, then you subtract 8 from both sides of the equal sign. (20-8=12) then you’re left with -4y = 12 divide by -4 on both sides of the equal sign, and y= -3 (and you’re already given the value of x)

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3 years ago