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3 years ago

Solve by substitution or elimination 4X – 3y = 7 4x + y = 11

Mathematics

1 answer:

Simora [160]3 years ago

8 0

Answer:

(5/2 , 1)

Step-by-step explanation:

4X – 3y = 7

4x + y = 11

———————

Multiply a -1 to the bottom equation to get the 4x as a negative so it cancels out.

4x - 3y = 7

-4x - y = -11

——————

-4y = -4

Divide by -4

y = 1

Substitute the value of y into one of the equations and solve

4x - 3(1) = 7

4x -3 = 7

4x = 10

Divide by 4

X = 10/4

Simplify by dividing by 2

x = 5/2

Therefore the answer is (5/2, 1 )

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3 years ago

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Answer:

90 arrangements

Step-by-step explanation:

Since there are no repititions of letters, there are unique 10 letters in total.

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Now, n = 10 [total] and r is 2, so we have:

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So, there can be 90 arrangements

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3 years ago

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tigry1 [53]

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Step-by-step explanation:

See the photo for explanation and work.

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3 years ago

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