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Juliette [100K]
3 years ago
15

47x + 31y = 63 31x + 47y = 15

Mathematics
1 answer:
NikAS [45]3 years ago
7 0

Answer:

x = 2, y = -1

Step-by-step explanation:

47x + 31y = 63...eqn 1

31x + 47y = 15...eqn 2

multiply eqn 1 by 47 to get eqn 3 and multiply eqn 2 by 31 to get eqn 4...

=> 2209x + 1457y = 2961...eqn 3

=> 961x + 1457y = 465...eqn 4

subtract eqn 4 from eqn 3

=> 1248x = 2496

=> x =2

subst x =2 in eqn 1

=> 94 + 31y = 63

=> 31y = -31

=> y = -1

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Answer:

3.0 Miles per hour

Step-by-step explanation:

https://www.countcalculate.com/cars-and-speed/average-speed/result?r=jfqffaktat

3 0
3 years ago
A sneaker company can make 50 pairs of sneakers for every 6 yards of material. Make a table to show the relation between materia
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A sneaker company can make 50 pairs of sneakers for every 6 yards of material.

Then in each case you can consider proportion.

1. 50 pairs -- 6 yards,

80 pairs -- x yards.

Mathematically,

\dfrac{50}{80}=\dfrac{6}{x},\\ \\x=\dfrac{80\cdot 6}{50}=9.6\ yards.

2. 50 pairs -- 6 yards,

100 pairs -- x yards.

Mathematically,

\dfrac{50}{100}=\dfrac{6}{x},\\ \\x=\dfrac{100\cdot 6}{50}=12\ yards.

3. 50 pairs -- 6 yards,

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Mathematically,

\dfrac{50}{120}=\dfrac{6}{x},\\ \\x=\dfrac{120\cdot 6}{50}=14.4\ yards.

4. 50 pairs -- 6 yards,

140 pairs -- x yards.

Mathematically,

\dfrac{50}{140}=\dfrac{6}{x},\\ \\x=\dfrac{140\cdot 6}{50}=16.8\ yards.

Thus, the table is

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The domain of the relation is the set \{50,80,100,120,140\} and the range of the relation is \{6,9.6,12,14.4,16.8\}.See attached diagram for the graph of the relation.

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3 years ago
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mr Goodwill [35]

yo sup??

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see below    PLEASE GIVE BRAINLIEST!!

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