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3 years ago

Solve the system by substitution. 2x=y-10 2x+7=2y The solution is ( , ).

Mathematics

1 answer:

Ugo [173]3 years ago

7 0

Answer:

Step-by-step explanation:

2x=y-10

2x+7=2y

====

2x=y-10

x = (y-10)/2

Use this in the 2nd equation:

2x+7=2y

2((y-10)/2)+7=2y

y - 10 + 7 = 2y

-y -3 = 0

-y = 3

y = -3

Use this in either equation:

2x=y-10

2x=(-3)-10

x = -(13/2) or - 6.5

(-6.5, -3)

See attached graph.

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sp2606 [1]

Answer:

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4 years ago

Factor the expression. k2 + 5kf – 50f2

g100num [7]

Answer:

We have

k^2 - 25f^2 + 5kf - 25f^2 =

k^2 - (5f)^2 + 5f( k - 5f) =

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Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

Using the digits 2,3,5,6,8 find the smallest possible product?

MA_775_DIABLO [31]

the product is always the same:

1440

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3 years ago

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antiseptic1488 [7]

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4 0

3 years ago

1-1 Relations and Functions The following list details the numbers of tickets sold for a talent show: grade 9: 22; grade 10: 32;

zlopas [31]

Answer:

$Domain = \{9, 10, 11, 12\}$

$Range = \{22, 32, 41, 30\}$

Step-by-step explanation:

Given

Grade 9: 22

Grade 10: 32

Grade 11: 41

Grade 12: 30

Required

Determine the domain and the range

The domain and range of a function is represented as thus (x,y)

From the given parameters;

$(x,y) = (Grade\ 9, 22), (Grade\ 10, 32) (Grade\ 11, 41), (Grade\ 12, 30)$

Remove "Grade" to represent as only digits

$(x,y) = (9, 22), (10, 32), (11, 41), (12, 30)$

Split to x and y values:

<em>Where x = domain and y = range</em>

$Domain = \{9, 10, 11, 12\}$

$Range = \{22, 32, 41, 30\}$

<em>So, from the list of given options; option C answers the question.</em>

4 0

3 years ago