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Andrew [12]
3 years ago
12

Help me with this pleaseee.

Mathematics
2 answers:
katrin [286]3 years ago
8 0
The answer to that is b
Rom4ik [11]3 years ago
6 0

Answer:

i think it would be B bc its not A or C

Step-by-step explanation:

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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}

3 0
2 years ago
Select the correct answer.
ch4aika [34]

Answer:

home inventory

Step-by-step explanation:

the insurance company wants to know what they are going to be insuring

4 0
3 years ago
Read 2 more answers
Add and Subtract Decimals to
Bogdan [553]
It should be 0.4 cause 0.4 is the same as 0.40
4 0
2 years ago
Find the original length if the map length is of 5cm and whose map ratio is 1:10000.
Virty [35]
50000 units on ground length

5:x 1:10000
5/x=1/10000
50000=x
Would appreciate a brainlist ty :)
6 0
2 years ago
Read 2 more answers
A stack of books is 5 feet 1 inch high. How high is it in inches?
zhannawk [14.2K]

Answer:

61 Inches

Step-by-step explanation:

<em>A foot is 12 inches. </em>

1. Multiply 12 by 5.

12*5=60

2. Add the extra inch.

60+1=61

<em>The stack of books is 61 inches high.</em>

3 0
2 years ago
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