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Bingel [31]
3 years ago
7

She has 7 initiatives and wants to put 2 stickers on each. She has 10 stickers. How many more stickers does she need?

Mathematics
1 answer:
Zina [86]3 years ago
8 0

Answer:

4

Step-by-step explanation:

If she wants to put 2 on each invitation, then we multiply the amount of invitations she has by the amount of stickers going on each invitation. 7 times 2 is 14.

She has 10 stickers, and she needs 14 in total, so we subtract 10 from 14 and we get 4.

In conclusion, the girl needs 4 sticks more

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3 years ago
Angela is taping 7 boxes for storage. She uses 1 1/2 feet of tape to close each box how much tape will Angela need to tape the b
Mrrafil [7]

Answer:

B. 10 1/2 feet

Step-by-step explanation:

We are told that she taped 7 boxes.

We are also told that she uses 1 1/2 feet of tape to close each box.

Therefore, the length of tape she will need to use for the 7 boxes will be the product of 7 boxes and 1 1/2 feet of tape per box:

L = 1 1/2 * 7 = 3/2 * 7 = 21/2 = 10 1/2 feet.

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Answer:

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Step-by-step explanation:

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3 years ago
Find values of a, b, and c (if possible) such that the system of linear equations has a unique solution, no solution, and infini
Cerrena [4.2K]

Answer:

IMPOSSIBLE

Step-by-step explanation:

First we set the equation system:

x+y+0z=0\\0x+4y+z=0\\4ax+by+cz=0

Now we set the matrix in order to have a solution for the system:

\left[\begin{array}{ccc}1&1&0\\0&4&1\\4a&b&c\end{array}\right]

Now we are going to apply Gauss-Jordan to find the solution of the system in terms of a, b and c:

-4aR_{1}+R_{3}\rightarrow R_{3}\\\\{\left[\begin{array}{ccc}1&1&0\\0&4&1\\0&(-4a+b)&c\end{array}\right]

Next step:

(4a-b)R_{2}+4R_{3} \rightarrow R_{3}\\\\{\left[\begin{array}{ccc}1&1&0\\0&4&1\\0&0&(4a-b+c)\end{array}\right]

Next step:

(4a-b+c)R_{2}-R_{3} \rightarrow R_{2}\\\\{\left[\begin{array}{ccc}1&1&0\\0&4(4a-b+c)&0\\0&0&(4a-b+c)\end{array}\right]

Next step:

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With this solution, we have a new equation system:

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This system can be solved by Cramer's rule, by finding the matrix determinant:

\left[\begin{array}{ccc}16&-4&4\\16&-4&4\\4&-1&1\end{array}\right]

\Delta s= (-64-64-64)-(-64-64-64)=0

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Answer:

$165

Step-by-step explanation:

....................

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