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torisob [31]
3 years ago
11

Solve using the elimination method. Also determine whether each system is consistent or inconsistent and whether the equations a

re dependent or independent.
3x-12y=6
2x-8y=4
Mathematics
1 answer:
mixas84 [53]3 years ago
7 0

Answer:

System is inconsistent and equations are mutually dependent.

Step-by-step explanation:

Let divide each linear equation by its smallest coefficient:

x-4\cdot y = 2

x-4\cdot y = 2

By using the elimination method on variable x, the following equivalence appears:

2-4\cdot y = 2-4\cdot y

Since one of the equation is a multiple of the other one, there is not an unique solution and equations are mutually depedent. The system is inconsistent.

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Which graph shows a system of equations with no solutions?
podryga [215]

Graph of Parallel lines shows a system of equations with no solutions

Step-by-step explanation:

Consider a set of equations

7x - 2y = 16\\21x + 6y =24

If we solve this both equations using any one of the solving method, (Substitution method) then we will get

7x-2y=16\\7x=16+2y\\x=\frac{16+2y}{7}

substituting the following x in 2nd equation (21x + 6y = 24) We get

21(\frac{16+2y}{7} )+6y=24\\3(16+2y)+6y=24\\48+6y+6y=24\\12y=24-48\\y=-\frac{24}{12} \\y=-2

Put y= -2 in x equation

x=\frac{16+2(-2)}{7}\\ x=\frac{16-4}{7}\\\x=\frac{12}{7} \\x=1.71

Comparing these (x,y) values we can understand that they never meet at a point

4 0
3 years ago
Pls find the volume :))
vovangra [49]

Answer:

The volume can be found by multiplying these two numbers, which is

65/4 x 1/2

65/8 units^3

Let me know if this helps!

3 0
3 years ago
Read 2 more answers
What is 6 3/4, 6 5/8, 3 1/4, 3 3/8 from least to greatest?
weeeeeb [17]

Answer:

3 1/4, 3 3/8, 6 5/8, 6 3/4

Step-by-step explanation:

4 0
3 years ago
Charles bought 3 Chinese dishes yesterday. Each of the dishes cost $15.25. How much did he spend on Chinese food?
emmasim [6.3K]
I believe the answer is $45.75.
I hope this helps.
If you would like an explanation of how I got this, please reply.
7 0
3 years ago
What is the solution to this equation?<br> 9x - 4(x - 2) = x + 20
ioda

9x - 4(x - 2) =x + 20

We move all terms to the left:

  • 9x -4(x - 2) - (x + 20) = 0

Multiply

  • 9x - 4x -(x + 20) + 8 = 0

We get rid of the parentheses.

  • 9x - 4x - x - 20 + 8 = 0

We add all the numbers and all the variables.

  • 4x - 12 = 0

We move all terms containing x to the left hand side, all other terms to the right hand side

  • 4x=12
  • x = 12/4
  • x = 3
7 0
2 years ago
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