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2 years ago

Solve the system of linear equations by substitution. 2x-y=3 x+5y=14

Mathematics

1 answer:

Arturiano [62]2 years ago

6 0

Answer:

x= 29/11 or y= 25/11

Step-by-step explanation:

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

x + 5y= 14 ............equation 2

Make x the subject of the formula in equation 2

x= 14 - 5y ..............equation 3

Substitute x=14 - 5y in equation 1

2(14- 5y) - y=3

28 - 10y - y=3

Collect like terms

-10y - y=3 - 28

-11y= -25

divide both sides by coefficient of y

-11y/-11 = -25/-11

y= 25/11

Substitute y= 25/11 in equation 3

x=14 - 5(25/11)

x= 14 - 125/11

x= 29/11

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Answer: There are 24 traffic lights on Berry Boulevard.

Step-by-step explanation:

Since we have given that

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So, According to unitary method,

In every $\dfrac{2}{5}\ mile$ , number of roads = 2

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Step-by-step explanation:

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3 years ago

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EleoNora [17]

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2 years ago

The scores of 1000 students on a standardized test are normally distributed with a mean of 50 and a standard deviation of 5. wha

ra1l [238]

We are looking to find P(X>60 students)

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