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Naya [18.7K]
4 years ago
8

Solve the system of linear equations by substitution. 2x-y=3 x+5y=14

Mathematics
1 answer:
adoni [48]4 years ago
4 0
Let 2x – y = 3 ——— equation 1

Let x + 5y = 14 ——— equation 2

Making x the subject in eqn 1, = x = y + 3 / 2 ——— eqn 3

• Put eqn 3 in eqn 2

(y + 3 / 2) + 5y = 14

6y = 14 – 3/2

6y = 25/2

y = 25/12

• put y = 25/12 in eqn 3

x = (25/12 + 3/2)

x = 43/12
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12 is what percentage of 14
natima [27]

Answer:

85.714%

Step-by-step explanation:

You are essentially solving for the percentage of 12/14. Divide:

12/14 = 0.85714

Change the decimal into a percentage by moving the decimal point to the right two place values:

0.85714 = 85.714%

85.714% is your answer.

~

3 0
3 years ago
Read 2 more answers
*Remember solutions are found in the shaded area or on a solid line (points on a dashed line are not a solution).
Irina-Kira [14]

The solutions for the inequality are -

  • (3, 3)
  • (7, 7)
  • (10, 10)

<h3>What is the general equation of a Straight line? What is linear inequality?</h3>

The general equation of a straight line is -

[y] = [m]x + [c]

where -

[m] → is slope of line which tells the unit rate of change of [y] with respect to [x].

[c] → is the y - intercept i.e. the point where the graph cuts the [y] axis.

A inequality is used to compare two or more expressions. The straight line inequalities are of the form -

y > mx + c

y < mx + c

y ≥ mx + c

y ≤ mx + c

We have the following inequality -

x + 3y > 6

We can write -

x + 3y > 6

3y > - x + 6

y > (-1/3)x + 2

Refer to the graph of the inequality attached. The plotted points in the shaded region represent the solutions for the inequality. We can write -

  • (3, 3)
  • (7, 7)
  • (10, 10)

Therefore, the solutions for the inequality are -

  • (3, 3)
  • (7, 7)
  • (10, 10)

To solve more questions on Plotting inequalities, visit the link below -

brainly.com/question/1782515

#SPJ1

7 0
1 year ago
For any value of x, the sum <br> 3<br> ∑ k(2x-1) <br> k=0<br> is equivalent to
MArishka [77]

The equivalent value of the sum for any value of "x" is 12x - 6

<h3>How to find the sum of functions?</h3>

Given the sum of the expression as:

3

∑ k(2x-1)

k=0

We need to take the sum of the function at the point where k = 0 to 3

3

∑ k(2x-1) = 0(2x-1) + 1(2x - 1) + 2(2x-1) + 3(2x - 1)

k=0

3

∑ k(2x-1) = 2x-1+4x-2+6x-3

k=0

3

∑ k(2x-1) = 12x - 6

k=0

Hence the equivalent value of the sum for any value of "x" is 12x - 6

Learn more on sum functions here: brainly.com/question/24295771

8 0
2 years ago
2 1/8 divided by 34?? Pls help, must be in fraction form
inn [45]
2 1/8=2.125 2.125?34=1/16
4 0
3 years ago
Read 2 more answers
Solve by substitution<br> 2 x + 3y = 5<br> 2x + 3y = 4
cluponka [151]

Answer:

2(1)+3(1)Is 5    2(2)+ 3(0) is 4

Step-by-step explanation:

Please mark brainlest

8 0
3 years ago
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