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Shalnov [3]
3 years ago
11

To solve this system of equations by elimination, what operation could be used to eliminate the x-variable and find the value of

y?
−6x − 4y = 2
−4x − 7y = 2
Mathematics
1 answer:
stepan [7]3 years ago
7 0

Answer:

see explanation

Step-by-step explanation:

Given the 2 equations

- 6x - 4y = 2 → (1)

- 4x - 7y = 2 → (2)

Multiplying (1) by 4 and (2) by - 6 will eliminate the x- term

- 24x - 16y = 8 → (3)

24x + 42y = - 12 → (4)

Add (3) and (4) term by term

26y = - 4 ( divide both sides by  26 )

y = \frac{-4}{26} = - \frac{2}{13}

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Work out the number of sides of a regular polygon with the interior angle of 172 degrees.
Harman [31]
interior\ angle=\frac{(n-2)*180}{n}\\n-number\ of\ sides\\\\
172=\frac{(n-2)*180}{n}\ \ \ |*n\\
172n=180n-360\ \ \ |Subtract\ 180n\\
-8n=-360\ \ \ |Divide\ by\ -8\\
n=45\\\\
Number\ of\ side\ is\ equal\ to\ 45.
8 0
3 years ago
What is the equation in point slope form, for a line that goes through (7, -8) and (-4, 6) brainly
Anika [276]

Answer:

The equation of the line is y - 6 = -14/11(x + 4)

Step-by-step explanation:

To find the equation of this line, we first need to find the slope. To do that, we use the slope equation.

m(slope) = (y2 - y1)/(x2 - x1)

m = (6 - -8)/(-4 - 7)

m = (6 + 8)/(-4 - 7)

m = 14/-11

m = -14/11

Now that we have the slope, we can use it and either point in point-slope form and solve for the equation.

y - y1 = m(x - x1)

y - 6 = -14/11(x + 4)


5 0
2 years ago
A certain food has a gluten ratio of 13 mg of gluten per L of the food. What is the gluten ratio in micrograms per milliliter uh
hammer [34]

For this case we must do a conversion. By definition we have to:

1 milligram equals 1000 micrograms

1 liter equals 1000 milliliters

So:

13 \frac {mg} {L} * (\frac {1} {1000} * \frac {L} {mL}) * (\frac {1000} {1} * \frac {ug} {mg}) =\\\frac {13 * 1000} {1000} * \frac {ug} {mL} =\\13 \frac {ug} {mL}

Answer:

13 \frac {ug} {mL}

3 0
3 years ago
Read 2 more answers
Which expression represents 5 less than y
svlad2 [7]

[ Answer ]

\boxed{Y \ - \ 5}

[ Explanation ]

  • Which Expression Represents "5 Less Than Y"

Less Than Sign: -

When You See "Less Than" That Means Subtraction

5 Less Than Y

  • What We Know:
  • Subtraction Is Used
  • Y Is Greater Than 5
  • We Need To Subtract 5 From Y

Subtract 5 From Y

Y - 5

\boxed{[ \ Eclipsed \ ]}

4 0
2 years ago
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