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Orlov [11]
3 years ago
11

) Write an expression that is equivalent to 3(7 + x).

Mathematics
1 answer:
nata0808 [166]3 years ago
8 0

Answer:

=21 + 3x

Step-by-step explanation:

use distributive property

=3(7 + x)

=21 + 3x

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1. Given line segment RB and on it is point C, if RB = 45 and CB = 3x - 12 and RC = 2x + 9, what is the value of x?
marshall27 [118]

Answer:

Step-by-step explanation:

1). If a point C is lying on a line segment RB,

   Then RB = RC + CB

   Since, RB = 45, CB = 3x - 12 and RC = 2x + 9

   45 = (2x + 9) + (3x - 12)

   45 = (2x + 3x) - 3

   48 = 5x

   x = \frac{48}{5}

   x = 9.6

2). Since, RC = 2x + 9

    RC = 2(9.6) + 9

          = 19.2 + 9

          = 28.2 units

3). Distance between the two points (x_1,y_1) and (x_2,y_2) is given by the formula,

  d = \sqrt{(x_2-x_1)^2+(y_2-y_1)^2}

  Distance between the points A(2, -2) and D(-2, 2) will be,

 AD=\sqrt{(2+2)^2+(-2-2)^2}  

         = \sqrt{16+16}

         = 4\sqrt{2}  

         = 5.657

         ≈ 5.66 units

7 0
3 years ago
Help me. I'm really confused!
Anettt [7]

Answer:

Step-by-step explanation:

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2 years ago
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Alex73 [517]

Answer:

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Step-by-step explanation:

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16/8 can be simplified to

2

4 0
3 years ago
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saveliy_v [14]

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Step-by-step explanation:

5 0
3 years ago
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Which equation represents 4x – 3y = 15 when solved for y
andrey2020 [161]

Answer:

y=4/3x-5

Step-by-step explanation:

4x-3y=15

-4x      -4x

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-3y=-4x+15

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-3     -3   -3

y=4/3x-5

5 0
3 years ago
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