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tensa zangetsu [6.8K]
2 years ago
9

Please help me! 20 points! You don't have to graph btw! I only need help with 7 and 8!

Mathematics
2 answers:
Eva8 [605]2 years ago
7 0

I can't see pictures, but I'll try to help.

This is just an example.

3x+5>2x-7

   -5       -5

I subtracted 5 on both sides to cancel out it out.

3x>2x-12

-2x -2x

I subtracted the 2x to cancel it out.

x>-12

---

hope it helps

let me know if more explanation/example is needed

Mumz [18]2 years ago
6 0

Answer:

7. n>9

8. put an open dot a 9 and draw arrows to the right

9. x≤55

10. put a close dot on 55 and draw arrow to the left

move those numbers to the right or left sideeee

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Answer:

If there is 1 at the top, then you have 1, then 2, then 3, etc.

total number of oranges equals:

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You can use the formula:

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-->

18*19/2 = 9*19 = 171

or you can figure it out (basically derive the above formula):

you have:

1 + 18 = 19

2 + 17 = 19

3 + 16 = 19

...

How many pairs do you have?  Well, it's just the number of numbers: 1-18 = 18 numbers (divide by 2) = 9 pairs)

9 pairs of 19 = 9 * 19 = 171

Hope this helps!

Step-by-step explanation:

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