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Marina CMI [18]
2 years ago
11

2x+2y=-2 3x-2y=12 I do not understand this math and need help with this math equation.

Mathematics
1 answer:
Ksivusya [100]2 years ago
5 0

Answer:

Also see attachments

Step-by-step explanation:

You have two equations and two "unknowns" x and y.

This is an easy one. Add the two equations together, which will eliminate the y terms so you can solve for x:

2x+2y = -2

3x-2y = 12

---------------

5x  = 10,   so x = 2.

Now plug the 2 back into one of the equations and solve it for y.

2(2)+2y = -2

4+2y = -2

2y = -6

y = -3

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Hey! I need this pretty fast- just do the first one though! Thank you! :)
Karolina [17]

Step-by-step explanation:

A. part 1: $1.49 for 6 pencils

1 pencil would cost $1.49 / 6 = $0.24833(5s.f.) = $0.25 (nearest cent)

part 2: $4.60 for 20 pencils

1 pencil would cost $4.60 / 20 = $0.23

best value: part 2 (20pencil pack)

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4 0
3 years ago
Which describes this angle?
Arisa [49]

Answer:

Your answer would be the first option.

A right angle is 90 degrees

An obtuse angle is more than 90 degrees and that angle is more that 90 degrees

6 0
3 years ago
How many squares to shade
slamgirl [31]
You got to shade five squares
6 0
3 years ago
D is the midpoint of CE. If CD= 2x+10 and DE =3x-18, find x and CE<br><br> x=<br> CE=
Veseljchak [2.6K]

Answer:

<h2>x = 28</h2><h2>CE = 132</h2><h2 />

Step-by-step explanation:

|<------------- CE -------------------->|

C-------------------D-------------------E

       2x + 10              3x - 18

2x + 10 = 3x - 18

2x - 3x = -18 - 10

-x = -28

x = 28

CE = 2x + 10 + 3x - 18

CE = 2(28) + 10 + 3(28) - 18

CE = 56 + 10 + 84 - 18

CE = 132

3 0
3 years ago
Simplify 2(5x – 4) + 3x
guapka [62]
To simplify, you must distribute the 2 into the 5x and -4 by multiplying 2 with 5x and 2 with -4.

<span>2(5x – 4) + 3x

2 x 5x = 10x

2 x -4 = -8

 You will get 10x - 8 + 3x

Now you must combine like terms or add like terms. In this case we must add 10x and 3x

10x + 3x = 13x

Finally the answer would be 13x - 8</span>
6 0
3 years ago
Read 2 more answers
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