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Roman55 [17]
3 years ago
14

St. Patrick's Day Problem Solving

Mathematics
1 answer:
IgorC [24]3 years ago
4 0
Maybe the answer 3.5 I don’t know
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Substitute this equation x+3y=18 & -x-4y=-25
sveticcg [70]

Answer:

 {x,y} = {3/7,-43/7}

Step-by-step explanation:

System of Linear Equations entered :

  [1]    x + 3y = -18

  [2]    -x + 4y = -25

Graphic Representation of the Equations :

   3y + x = -18        4y - x = -25  

 

 

Solve by Substitution :

// Solve equation [1] for the variable  x  

 

 [1]    x = -3y - 18

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

  [2]    -(-3y-18) + 4y = -25

  [2]    7y = -43

// Solve equation [2] for the variable  y  

  [2]    7y = - 43  

  [2]    y = - 43/7  

// By now we know this much :

   x = -3y-18

   y = -43/7

// Use the  y  value to solve for  x  

   x = -3(-43/7)-18 = 3/7  

Solution :

{x,y} = {3/7,-43/7}

5 0
3 years ago
Please can anyone help what is AC
Nesterboy [21]

The answer is C.

You need you use Pythagoras theorem 2 times to have 2 equations with the same sides i.e. for example a2 + b2 = 81 and a2 - b2 = 9.

You can do it as you have different triangles but with the same sides.

7 0
3 years ago
Solve simultaneously <br>2 log y=log 2 + log x <br>2 to power y = 4 to power x<br>​
skad [1K]

Answer:

Step-by-step explanation:

hello : here is an solution

3 0
3 years ago
Ariel has a plastic ice cream cone in her food playset. The ice cream cone is a half-sphere sitting on top of a cone. What is th
dsp73

52 Step-by-step explanation:

4 0
3 years ago
Which point is on the perpendicular bisector of the segment with endpoints (-2,5) and (-2,-3)
Kryger [21]
(-2,0)

Lies on the X axis makes it perpendicular with the other points
3 0
3 years ago
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