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True [87]
3 years ago
12

NEED HELP ASAP PLEASE

Mathematics
1 answer:
ipn [44]3 years ago
8 0

Answer:

These have no solution:

  • 2x < x+1 and x+1 > 3
  • 3x -5 > 1 and x < 2

Step-by-step explanation:

1.  2x < x+1

  x < 1 . . . . . subtract x

__

  x + 1 > 3

  x > 2 . . . . subtract x

No solution: x cannot be both > 2 and < 1.

_____

2. 3(x +2) > x

  3x + 6 > x . . . . eliminate parentheses

  2x + 6 > 0 . . . subtract x

  x + 3 > 0 . . . . . divide by 2

  x > 0

Solution: 0 < x < 2

_____

3. 5x ≥ 10

  x ≥ 2 . . . . . divide by 5

__

  2x ≤ 4

  x ≤ 2 . . . . . divide by 2

Solution: 2 ≤ x ≤ 2 . . . . x = 2

_____

4. 3x -5 > 1

  3x > 6 . . . . . . . add 5

  x > 2 . . . . . . . . divide by 3

No solution: x cannot be both < 2 and > 2.

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A cylindrical container of disinfectant wipes with a radius of 1 inch and a height of 10 inches is sold
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Answer:

0.02

Step-by-step explanation:

5/69.12=0.0723

3/69.12=0.0434

0.0723-0.0434=0.0289

=0.02

5 0
3 years ago
John took a 5-mile walk to his friend's house.
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Answer:

2 hours

Step-by-step explanation:

add the time before and after adding 30 mins. (1 hour and 45 minutes/ 2 hours and 15 mins.) then divide by 2

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sergij07 [2.7K]
I’m almost done solving this
3 0
3 years ago
Pls solve 2x/5=6 tnx luuv u guys
Mazyrski [523]

Answer:

x=15

Step-by-step explanation:

2x/5=6

Multiply each side by 5/2 to isolate x

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6 0
3 years ago
Read 2 more answers
By cutting away identical squares from each corner of a rectangular piece of cardboard and folding up the resulting flaps, an op
sp2606 [1]

Answer:

The maximum volume is: 11.52 *10.52*2.74  = 332.06 in^{3}

Step-by-step explanation:

Let x is the side of the square in inches.(x >0)

The volume of the resulting box when the flaps are folded up can be expressed as:

V  = x (17 -2x)(16-2x)

= (17x -2x^{2})(16-2x)

= 4x^{3} - 66x^{2} +  272x

To find the value of x which yields the maximum of volume (V), take the first derivative of this equation and set it equal to zero.

\frac{dV}{dx} = 12x^{2} - 66x + 272

Solve 12x^{2} - 132x + 272  = 0

<=> x = 2.74

The dimensions of the box are:

Length: (17 -2x) = (17 -2*2.74) = 11.52

Width: (16-2x) = (16-2*2.74) = 10.52

High: x = 2.74

So the maximum volume is: 11.52 *10.52*2.74  = 332.06 in^{3}

6 0
3 years ago
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