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zhuklara [117]
3 years ago
15

Expand 4y(y-3)

Mathematics
2 answers:
Oduvanchick [21]3 years ago
8 0

Answer:

4*y^2 - 12*y

Step-by-step explanation:

4y(y-3) = 4y*y - 4y*3 = 4*(y^2) - 12*y

const2013 [10]3 years ago
7 0

Answer:

4y(y-3)

4y^2-12y

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Solve 10n^2+4n+15n+6​
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Answer:

Step-by-step explanation:

10n^2 +4n+15n+6 [Add the like terms]

10n^2 +19n +6

Hope this helps!

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Michael cleans 90 cars in 5 days. How many cars does Michael clean per day?
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18

Step-by-step explanation:

Since he does 90 cars-----5 days

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As an estimation we are told £3 is €4.<br> Convert €52 to pounds.
kati45 [8]

Answer:

£69.33

Step-by-step explanation:

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3 years ago
Solve the system of equations.
Ksenya-84 [330]

Answer:

1) {y,x}={-3,-23}

2) {x,y}={7,-9/2}

Step-by-step explanation:

Required:

  • Solve systems of equations

1) y - x = 20, 2x - 15y = -1

Equations Simplified or Rearranged :

[1]    y - x = 20

  [2]    -15y + 2x = -1

Graphic Representation of the Equations :

x + y = 20        2x - 15y = -1  

Solve by Substitution :

// Solve equation [1] for the variable  y

 [1]    y = x + 20

// Plug this in for variable  y  in equation [2]

  [2]    -15•(x +20) + 2x = -1

  [2]     - 13x = 299

// Solve equation [2] for the variable  x

[2]    13x = - 299

  [2]    x = - 23

// By now we know this much :

  y = x+20

   x = -23

// Use the  x  value to solve for  y

   y = (-23)+20 = -3

Solution :

{y,x} = {-3,-23}

2) 25-x=-4y,3x-2y=30

Equations Simplified or Rearranged :

  [1]    -x + 4y = -25

  [2]    3x - 2y = 30

Graphic Representation of the Equations :

   4y - x = -25        -2y + 3x = 30  

Solve by Substitution :

// Solve equation [1] for the variable  x

  [1]    x = 4y + 25

// Plug this in for variable  x  in equation [2]

 [2]    3•(4y+25) - 2y = 30

  [2]    10y = -45

// Solve equation [2] for the variable  y

  [2]    10y = - 45

  [2]    y = - 9/2

// By now we know this much :

  x = 4y+25

   y = -9/2

// Use the  y  value to solve for  x

  x = 4(-9/2)+25 = 7

Solution :

{x,y} = {7,-9/2}

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A translation by_____ units to the right/left and _____ units up down
Alexandra [31]
8 units left and 5 units up
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