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2 years ago

2x + 6y= 8 4x + 12y = 16

Mathematics

1 answer:

Korolek [52]2 years ago

3 0

Answer:

x=0 , y=0

Step-by-step explanation:

2x +6y= 8 .....eqn 1

4x +12y= 16....eqn2

we multiply eqn 1 by 2.. because we want at least one variable to have the same coefficient so we can simply.

2x +6y =8... ×2

will give you 4x +12y = 16....eqn 3

so now we subtract eqn 2 from eqn 3

4x + 12y= 16

- 4x + 12y = 16

_____________

0 + 0 = 0

therefore x = 0 and y= 0

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Answer:

Liza need to drive 2 more hours to reach her sister house

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Given that Liza is driving to her sister's house 360 miles away

So total distance = 360 miles

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So Liza has covered 240 miles in 4 hours

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The relation between distance and speed is given as:

$speed = \frac{distance}{time}$

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Now distance = 120 miles and speed = 60 miles per hour

$time taken = \frac{distance}{speed}\\\\time taken = \frac{120}{60} = 2$

Thus Liza need to drive 2 more hours to reach her sister house

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