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marin [14]
3 years ago
10

PLEEZZ

Mathematics
1 answer:
jonny [76]3 years ago
4 0

4 < 4(6y - 12) - 2y       |use distributive property

4 < (4)(6y) + (4)(-12) - 2y

4 < 24y - 48 - 2y       |add 48 to both sides

52 < 26y      |divide both sides by 26

2 < y → y > 2

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

4x + 3 < 3x + 6      |subtract 3 from both sides

4x < 3x + 3       |subtract 3x from both sides

x < 3

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

-5r + 6 ≤ -5(r + 2)        |use distributive property

-5r + 6 ≤ (-5)(r) + (-5)(2)

-5r + 6 ≤ -5r - 10         |add 5r to both sides

6 ≤ -10     FALSE

No solution

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

-2(6 + s) ≥ -15 - 2s        |use distributive property

(-2)(6) + (-2)(s) ≥ -15 - 2s

-12 - 2s ≥ -15 - 2s        |add 2s to both sides

-12 ≥ -15     TRUE

All real numbers

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

3s + 6 ≤ -5(s + 2)        |use distributive property

3s + 6 ≤ (-5)(s) + (-5)(2)

3s + 6 ≤ -5s - 10         |subtract 6 from both sides

3s ≤ -5s - 16        |add 5s to both sides

8s ≤ -16         |divide both sides by 8

s ≤ -2

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

4/3 s - 3 ?

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7 0
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Multiple choice 10 points
liubo4ka [24]

Answer:

f'(x) = 5    x<4

      = 2x    4<x<6

     = 4         x>6

Domain is all real numbers except 4 and 6

Step-by-step explanation:

We need to find the derivative of the piecewise function

f'(x) = 5    x<4

      = 2x    4≤x≤6

     = 4         x>6

Is the function continuous at 4

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f(4+) = 4^2 -2 = 16-2 = 14    

this is continuous, so there is no problem with the continuity here

Is the function continuous at

f(6-) = 6^2 -2 = 36-2 = 34

f(6+) = 4(6)+10 = 24+10 = 34

this is continuous, so there is no problem with the continuity here

Now we need to check the derivatives

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f'(4+) = 8

This is not continuous, so we get a piecewise definition for the derivative excluding 4

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f'(6+) =4

This is not continuous, so we get a piecewise definition for the derivative excluding 6

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