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kipiarov [429]
3 years ago
10

-9 + x =12 what is x?

Mathematics
2 answers:
dolphi86 [110]3 years ago
3 0

Answer:

x = 21

Step-by-step explanation:

-9 + x = 12

+9         +9

x=21

seropon [69]3 years ago
3 0
X is 21 because we need at least 9 to get it back to zero because it’s a positive number then add 12 because that the number you need to get to and 21-9= 12
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21. You are making a rectangular poster to advertise a school fundraiser. You
liubo4ka [24]

The simplified expression for perimeter is 6w, and for area is 2w². 3 meters of a width will allow the most area while not exceeding a perimeter of 20 meters.

Step-by-step explanation:

Let w represent the width of the poster then,

The length of the poster is twice as long as its width, to mean the length is 2w

Perimeter is the distance around the figure. Your figure is a rectangle with sides width, w and length 2w;

Perimeter formula is = 2(l+w) where l is length and w is with

P=2(2w+w) = 2(3w) = 6w meters

Area is given by the product of length and width of the figure

Area=l*w

A=2w*w= 2w²

The table will be;

<u>Width in (m)       Perimeter=6w in (m)           Area (2w²) in m²</u>

3                          6*3= 18                                   2*3²=2*9=18

4                          6*4=24                                  2*4²=2*16=32

Width 3 allows for the most area while not exceeding a perimeter of 20 meters.

Learn More

Area of a rectangle figure : brainly.com/question/9624810

Keywords : rectangular poster, perimeter, area, expression

#LearnwithBrainly

3 0
3 years ago
What is equivalent to -4
Alinara [238K]
Since, it’s a -4 it’ll be a positive 4! That’s the same number just different signs.
3 0
3 years ago
Somebody help!!!!!!!!!
Natasha_Volkova [10]
A. Because any positive number is greater than a negative. So 1 3/4 is greater than -4
3 0
3 years ago
Can you guys please help ( for did the letter half cut out is Y
BabaBlast [244]

Answer:

\overline{OQ}

OQ

​

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Oq

8 0
3 years ago
What is the x in<br> 5x−3+2(x+4)
8090 [49]
<span>5x-3+2(x+4) solve for x
=</span><span>5x - 3 +2x + 8
</span><span>= 7x + 5
so 7x = -5
x = -5/7

</span>
6 0
4 years ago
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