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Studentka2010 [4]
3 years ago
14

2x-5y=3 4y-x=-3 solve by elimination

Mathematics
1 answer:
loris [4]3 years ago
4 0

Answer:

x = -1 and y = -1

Step-by-step explanation:

to solve this equation we say

let

2x-5y=3.......................................... equation 1

4y-x=-3............................................equation 2

from equation 2

4y-x=-3............................................equation 2

4y + 3 = x

i.e

x = 4y + 3 .............................................  equation 3

put x = 4y + 3 in equation 1

2(4y +3) - 5y = 3

8y + 6 -5y = 3

3y +6 = 3

3y= 3-6

3y -3

divide both sides by the coefficient  of y  which is 3

3y/3 = -3/3

y = -1

put y = -1 into equation 3

x = 4y + 3 .............................................  equation 3

x = 4(-1) + 3

x = -4 + 3

x = -1

therefore the value of x = -1 and y = -1 respectively

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Answer:

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2 years ago
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What is the perimeter of quadrilateral ABCD? a(-3,2) b(4,2) c(3,-3) d(-3,3)
lord [1]

Answer:

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Step-by-step explanation:

As we know the formula to get the length between two points A and B having coordinates A(x,y) and B (a,b) is

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AB=√(4+3)²+(2-2)² =√7² =7

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Since perimeter of the quadrilateral = sum of lengths of all sides

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8 0
2 years ago
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Researchers surveyed 250 college students at one time. They were asked if they were taking any engineering classes and whether o
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Answer:

the  incidence of the depression is  1 ÷ 5

Step-by-step explanation:

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3 years ago
What is the value of a in the equation 5a – 10b = 45, when b = 3?
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Here you go. Do you think that you could help me with my question

5a – 10b = 45 
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3 years ago
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