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Luden [163]
2 years ago
5

2x + 5y = 14 4x + 2y = -4 solving with elimination​

Mathematics
2 answers:
melamori03 [73]2 years ago
8 0

Answer:

(- 3, 4 )

Step-by-step explanation:

2x + 5y = 14 → (1)

4x + 2y = - 4 → (2)

multiplying (1) by - 2 and adding to (2) will eliminate the x- term

- 4x - 10y = - 28 → (3)

add (2) and (3) term by term to eliminate x

0 - 8y = - 32

- 8y = - 32 ( divide both sides by - 8 )

y = 4

substitute y = 4 into either of the 2 equations and solve for x

substituting into (1)

2x + 5(4) = 14

2x + 20 = 14 ( subtract 20 from both sides )

2x = - 6 ( divide both sides by 2 )

x = - 3

solution is (- 3, 4 )

m_a_m_a [10]2 years ago
6 0

Answer: x=-\frac{3}{179} =\\-0.016759777\\y=-\frac{142}{179} =\\-0.793296089

Step-by-step explanation: steps using substitution

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Grace rolled 33 inches of noodle dough. Each noodles is 3/8 long. How many noodles can she make?
victus00 [196]

Answer:

88

Step-by-step explanation:

33 ÷ 3/8

------------------

3/8 = 0.375

------------------------

33 ÷ 0.375 = 88

4 0
3 years ago
NEED HELP BADLY ITS A TEST
VikaD [51]

Answer:

A

Step-by-step explanation:

This is your answer because because the order pairs on not located on the same line.

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3 years ago
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a rectangle has a length of 9.3 time 10 to the 2nd power and width 8.4 times 10 to the 2nd power. what is the area of the rectan
goldfiish [28.3K]

(9.3 \times 10^{2} ) \times (8.4 \times 10^{2} ) = 781200 ^{2}
Quite a large number. Hope this helps! (781200(squared))
8 0
3 years ago
15. 19 - (12 – 6k) = 14 + 7k
DIA [1.3K]

Step-by-step explanation:

19 -12+6k=14+7k

7+6k=14+7k

-6k -6k

7=14+x

-14 -14

-7=x

5 0
3 years ago
Ignore everything I wrote but I’m supposed to be writing two-column proofs and I need help with these
zavuch27 [327]

What you have so far is perfect. You started with the given statements and then use the definition of midpoint to show that each piece is equal to one another.

From here, use the transitive property

We combine these two statements

  • WX = XY
  • XY = YZ

into the following

WX = YZ

So we can effectively say WX = XY = YZ meaning the segments WX, XY and YZ are all the same length.

Through similar logic, we can chain together

  • VW = WX
  • WX = XY

to get VW = XY

-------------

Consequently this means VW, WX, XY, and YZ are all the same length

Let's call that length m.

m = length of segment VW = length of WX = etc etc

This means,

VY = VW+WX+XY = m+m+m = 3m

and

WZ = WX+XY+YZ = m+m+m = 3m

Both VY and WZ are exactly 3m units long, therefore, VY = WZ

7 0
3 years ago
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