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harina [27]
3 years ago
5

Eliminate the y in the following system of equations. What is the result when you add the two equations?

Mathematics
2 answers:
Karo-lina-s [1.5K]3 years ago
7 0

Step-by-step explanation:

To eliminate y we multiply first equation by 4 then add it to the second equation :

  • 4 × (x+y)=2 ➡ 4x + 4y = 8
  • 4x + 4y + 3x -4y = 8 + 27 ➡7x = 35 ➡x = 5
  • Replace x with the value we found to calculate the value of y : x +y = 2➡5+y = 2 ➡y = -3

nika2105 [10]3 years ago
5 0

Answer:

Step-by-step explanation:

4x=29

X=29/4

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whats another way to write (s-6)(s+1) when s represents the side of a square and the equation represents the area of a rectangle
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The another way to write (s - 6)(s + 1) is s² - 5s - 6

Step-by-step explanation:

Let us revise how multiply two binomial (a + b)(x + y)

  • Multiply the 1st terms
  • Multiply the 2nd terms
  • Multiply the nears and extremes, where nears are the 2nd term of first bracket and 1st term in the second bracket, the extremes are the 1st term in the first bracket and the 2nd term in the second bracket
  • Add the like terms if necessary

∵ The area of the square = (s - 6)(s + 1)

- To find the another way multiply the two brackets

∵ s × s = s²

∵ -6 × 1 = -6

∵ -6 × s = - 6s ⇒ nears

∵ s × 1 = s ⇒ extremes

- The terms - 6s and s are like terms, then add them

∵ - 6s + s = - 5s

∴ (s - 6)(s + 1) = s² - 5s - 6

∴ The area of the square = s² - 5s - 6

The another way to write (s - 6)(s + 1) is s² - 5s - 6

Learn more:

You can learn more about the binomials in brainly.com/question/2334388

#LearnwithBrainly

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Step-by-step explanation:


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