25.04.2020

solve by elimination -10x + 6y = 20 20x - 10y = -20

. 5

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Mathematics
Step-by-step answer
P Answered by PhD

1. y = 8/11x + 10/11

2. y = -3/2x - 13/7

Step-by-step explanation:

1. -8x + 11y = 10

Add 8x to both sides

11y = 8x + 10

Divide both sides by 11

y = 8/11x + 10/11

2. 6 = -4y - 11x

20 = -10x - 10y

26 = -14y - 21x

Add 21x to both sides

-14y = 21x + 26

Divide both sides by -14 and simplify!

y = -3/2x - 13/7

Mathematics
Step-by-step answer
P Answered by PhD

1. y = 8/11x + 10/11

2. y = -3/2x - 13/7

Step-by-step explanation:

1. -8x + 11y = 10

Add 8x to both sides

11y = 8x + 10

Divide both sides by 11

y = 8/11x + 10/11

2. 6 = -4y - 11x

20 = -10x - 10y

26 = -14y - 21x

Add 21x to both sides

-14y = 21x + 26

Divide both sides by -14 and simplify!

y = -3/2x - 13/7

Mathematics
Step-by-step answer
P Answered by PhD

Question 1:

For this case we must solve the following system of equations by the method of elimination:

8x-6y=-20\\-16x+17y=30

We multiply the first equation by 2:

16x-12y = -40

We have the equivalent system:

16x-12y = -40\\-16x + 17y = 30

We add the equations:

5y = -10

We divide between 5 on both sides of the equation:

y = - \frac {10} {5}\\y = -2

We find the value of the variable "x":

8x-6 (-2) = - 20\\8x + 12 = -20\\8x = -20-12\\8x = -32

We divide by 8 on both sides of the equation:

x = - \frac {32} {8}\\x = -4

Thus, the solution of the system is:

(x, y): (- 4, -2)

(x, y): (- 4, -2)

Question 2:

For this case we must solve the following system of equations by the method of elimination:

-4y-11x = 36\\20 = -10x-10y

We multiply the first equation by 10:

-40y-110x = 360

We multiply the second equation by -4:

40y + 40x = -80

We have the equivalent system:

-40y-110x = 360\\40y + 40x = -80

We add the equations:-70x = 280

We divide by -70 on both sides of the equation:

x = \frac {280} {- 70}\\x = -4

We find the value of the variable "y":

-4y-11 (-4) = 36\\-4y + 44 = 36\\-4y = 36-44\\-4y = -8

We divide between -4 on both sides of the equation:

y = - \frac {8} {- 4}\\y = 2

Thus, the solution of the system is:

(x, y): (- 4,2)

(x, y): (- 4,2)

Mathematics
Step-by-step answer
P Answered by PhD

Question 1:

For this case we must solve the following system of equations by the method of elimination:

8x-6y=-20\\-16x+17y=30

We multiply the first equation by 2:

16x-12y = -40

We have the equivalent system:

16x-12y = -40\\-16x + 17y = 30

We add the equations:

5y = -10

We divide between 5 on both sides of the equation:

y = - \frac {10} {5}\\y = -2

We find the value of the variable "x":

8x-6 (-2) = - 20\\8x + 12 = -20\\8x = -20-12\\8x = -32

We divide by 8 on both sides of the equation:

x = - \frac {32} {8}\\x = -4

Thus, the solution of the system is:

(x, y): (- 4, -2)

(x, y): (- 4, -2)

Question 2:

For this case we must solve the following system of equations by the method of elimination:

-4y-11x = 36\\20 = -10x-10y

We multiply the first equation by 10:

-40y-110x = 360

We multiply the second equation by -4:

40y + 40x = -80

We have the equivalent system:

-40y-110x = 360\\40y + 40x = -80

We add the equations:-70x = 280

We divide by -70 on both sides of the equation:

x = \frac {280} {- 70}\\x = -4

We find the value of the variable "y":

-4y-11 (-4) = 36\\-4y + 44 = 36\\-4y = 36-44\\-4y = -8

We divide between -4 on both sides of the equation:

y = - \frac {8} {- 4}\\y = 2

Thus, the solution of the system is:

(x, y): (- 4,2)

(x, y): (- 4,2)

Mathematics
Step-by-step answer
P Answered by Specialist

This is the answer of your question.


Solve each system by elimination. 1) -10x + 8y = 10 2x + 2y = -20 2) 8x - 6y = -12 -3x + 12y = -15 3
Solve each system by elimination. 1) -10x + 8y = 10 2x + 2y = -20 2) 8x - 6y = -12 -3x + 12y = -15 3
Solve each system by elimination. 1) -10x + 8y = 10 2x + 2y = -20 2) 8x - 6y = -12 -3x + 12y = -15 3
Mathematics
Step-by-step answer
P Answered by Master

This is the answer of your question.


Solve each system by elimination. 1) -10x + 8y = 10 2x + 2y = -20 2) 8x - 6y = -12 -3x + 12y = -15 3
Solve each system by elimination. 1) -10x + 8y = 10 2x + 2y = -20 2) 8x - 6y = -12 -3x + 12y = -15 3
Solve each system by elimination. 1) -10x + 8y = 10 2x + 2y = -20 2) 8x - 6y = -12 -3x + 12y = -15 3
Mathematics
Step-by-step answer
P Answered by PhD
Answer: 440 grams for 1.54 is the better value
Explanation:
Take the price and divide by the number of grams
1.54 / 440 =0.0035 per gram
1.26 / 340 =0.003705882 per gram
0.0035 per gram < 0.003705882 per gram
Mathematics
Step-by-step answer
P Answered by PhD

Cost of 7 gallons=$24.50

Cost of 1 gallon=24.50/7=3.5

Cost of 15 gallons=15*3.5=52.5

Cost of 15 gallons will be $52.5

Mathematics
Step-by-step answer
P Answered by PhD

For 1 flavor there are 9 topping

Therefore, for 5 different flavors there will be 5*9 choices

No of choices= 5*9

=45 

Mathematics
Step-by-step answer
P Answered by PhD

Salesperson will make 6% of 1800

=(6/100)*1800

=108

Salesperson will make $108 in $1800 sales

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