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dezoksy [38]
3 years ago
14

Whats 9+12 i need help please help me

Mathematics
2 answers:
Anuta_ua [19.1K]3 years ago
4 0

Answer:

21

Step-by-step explanation:

bc

1

12

9

+--

21

Zarrin [17]3 years ago
3 0

Answer:

Hello, Your answer will be 21.

Step-by-step explanation:

Because 9 + 12=21

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How do you solve -5+-3?
Paha777 [63]
- 5 + -3 = -8

hope this helps


when a negative number adds a negative number, it will be negative

when a negative number adds a positive number, whichever number (either positive or negative) take the sign of the bigger one

For example:

-4 + 3 = -1

-5 + 10 = 5



hope this helps
8 0
3 years ago
Read 2 more answers
Can you guys please do both with the work please and thank you if you actually do it
salantis [7]

Answer:

  7.  29 cm

  8.  equation: 61 = (x) +(2x -7) +(3x +2); sides 11, 15, 35

Step-by-step explanation:

7. Let w represent the width. The length is 3 less than twice the width, so the length is 2w-3. The perimeter is given by the formula ...

  P = 2(L+W)

Substituting the known values, we have ...

  90 = 2((2w-3) +w)

  45 = 3w -3 . . . . . . . . divide by 2

  15 = w - 1 . . . . . . . . . .divide by 3

  16 = w . . . . . . . . . . . . add 1

  L = 2w -3 = 2(16) -3 = 29

The length of the rectangle is 29 cm.

__

8. The equation that should be used is the one that relates the side lengths to the perimeter.

  P = a + b + c . . . . for sides a, b, c

  61 = (x) +(2x -7) +(3x +2)

  61 = 6x -5 . . . . . . collect terms

  66 = 6x . . . . . . . . add 5

  11 = x . . . . . . . . . . divide by 6

Then the side lengths are ...

  a = x = 11

  b = 2x -7 = 2(11) -7 = 15

  c = 3x +2 = 3(11) +2 = 35

_____

<em>Comment on problem 8</em>

You will notice that the side lengths do not satisfy the triangle inequality: the sum of the short sides is not greater than the long side. <em>These side lengths cannot form a triangle</em>. Cute algebra, but <em>bad geometry</em>.

4 0
3 years ago
See the three. What proportion of the first 1000 natural numbers have a 3 somewhere in them? For example, 135, 403, and 339 all
Angelina_Jolie [31]
I think the proportion of the numbers from 1-1000 that contains 3 is 261 out of 1000 number and it includes the numbers in 300 place. I hope you are satisfied with my answer and feel free to ask for more if you have clarifications and further questions. 
5 0
3 years ago
Andrew has a Frisbee™ with a radius of 10 cm. What is the approximate circumference of the
Ne4ueva [31]

Answer:

The answer is D. 62.8

Step-by-step explanation:

I used this formula.

Circumference = 2πr

3 0
2 years ago
Earl needs to fill juice cups for his little brother’s birthday party. There are 25 juice cups each juice cup holds 12 fluid oun
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1 gallon = 128 fluid ounces

25 cups x 12 ounces = 300 total ounces needed

300 / 128 = 2.34 gallons needed

 he will need to buy C. 3 bottles

4 0
3 years ago
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