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bazaltina [42]
3 years ago
15

X+y=-3 y=2x Solve the linear equation

Mathematics
2 answers:
kobusy [5.1K]3 years ago
5 0
X + y = -3
y = 2x

x + y = -3
plug in 2x for y

x + 2x = -3
combine like terms

3x = -3
divide both sides by 3 to isolate x

x = -1
Cerrena [4.2K]3 years ago
4 0
X+Y=-3, Y=2X, so
X+2X=-3
3X=-3 | /3
X=-1
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8 0
3 years ago
In the book,the distance between two planets is given as 4.07×10^¹² kilometres. The speed of light is 1.1×10^⁹ kilometres per ho
Sphinxa [80]

Answer:

3700hours

154days

Step-by-step explanation:

Speed can be defined as the distance cover per time, it can be expressed as

Speed= distance/ time........eqn(1)

Given:

distance between two planets= 4.07×10^¹²

speed of light = 1.1×10^⁹ kilometres per hour

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Then substitute the values into equation (1) we have

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Cross multiply, we have

Time= (4.07×10^¹²kilometre) /(1.1×10^⁹ kilometres per hour)

Time= 3700hours.

To convert to day, we know that

60 minute= 1hour

24hour=1day

Time= (3700hour×1day)/24hour

Time= 154days approximately.

Hence, the time taken for light to travel from one of these planets to the other is 154days or 3700hours

7 0
3 years ago
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lyudmila [28]
I believe that it is 0.5
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3 years ago
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ludmilkaskok [199]
X= 3 or x= -3

this question has 2 solutions due to the variable, hope this helps! pls mark brainliest!
4 0
3 years ago
Read 2 more answers
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julsineya [31]

Answer:

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Step-by-step explanation:

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So, 10 inch segment = \frac{4}{5}\times 10=8 inch

thus, the 10 inch segment is equal to 8 inch on the scale.

5 0
3 years ago
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