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3 years ago

X=5y: 2x+5y=60 A) 10,4 B) 15,4 C) 20,4 D) 25,4

Mathematics

2 answers:

Firdavs [7]3 years ago

5 0

Answer:

Step-by-step explanation:

2x+5y=60

replace the x with 5y

2(5y)+5y=60

10y+5y=60

15y=60

divide both sides by 15

y=4

2x+5y=60

replace the y with 4

2x+5(4)=60

2x+20=60

subtract 20 from both sides

2x=40

divide both sides by 2

x=10

elena-14-01-66 [18.8K]3 years ago

3 0

Answer:

C) 20, 4

Step-by-step explanation:

X = 5y

2x + 5y = 60

substitute in 5y for x: 2(5y) + 5y = 60

10y + 5y = 60

15y = 60

y = 4

x = 5y

x = 5(4) = 20

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<u>Step-by-step explanation:</u>

To calculate the distance between the points, we use the formula:

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where,

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$y_2\text{ and }y_1$ are the coordinates of the points on y-axis

For the given points:

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Calculating the distance BC:

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Putting values in above equation, we get:

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Calculating the distance CE:

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Putting values in above equation, we get:

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To calculate the perimeter of a rectangle, we use the equation:

$Perimeter=2(l+b)$ ....(1)

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