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garik1379 [7]
3 years ago
13

How much cardboard is needed to make the cereal box shown below? You are finding the surface area of this box.

Mathematics
1 answer:
Irina-Kira [14]3 years ago
8 0

i would recommend asking a tutor because some people answer just to get points

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8
tia_tia [17]

Answer:

8-6i

Step-by-step explanation:

Multiply out (3-i)^2 in order to find out which expression it is equivalent to.

1) Since the whole quantity is squared, write it out as (3-i)(3-i).

(3-i)^2\\(3-i)(3-i)

2) Multiply binomials by using the FOIL method. Multiply the terms that are listed first in each binomial, then the ones that are listed outermost when looking at both binomials, then innermost, and finally the last terms listed in each binomial. Simplify and combine like terms.

(3-i)(3-i)\\9 - 3i - 3i + i^2

9 - 6i + i^2

3)  i = \sqrt{-1}, so i ^2 must be (\sqrt{-1} )(\sqrt{-1}). Thus, i^2 is equivalent to -1. Knowing this, simplify and combine like terms.

9 - 6i + ((-\sqrt{1} )(\sqrt{-1} ))

9 - 6i -1\\8 - 6i

Thus, it is equivalent to  8 - 6i .

6 0
3 years ago
8x + 13y = 2
Natasha2012 [34]
Eliminationg these equations gives zero ,no solution
6 0
3 years ago
Look at the photo plz !!
sergejj [24]

Answer:

11 0ver 54

Step-by-step explanation:

4 0
3 years ago
Can someone help with this question please
nirvana33 [79]

4×4=16


(8×4)4=128


(7×4)÷2=14

14×4=56


16+128+56=200


Ans: 200

6 0
3 years ago
How much louder (more intense) is a 55-decibel sound than a 10-decibel sound?
fredd [130]

Answer:

Try using quizlet or ask for a tutor I don’t understand that

Step-by-step explanation:

8 0
3 years ago
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