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hodyreva [135]
3 years ago
8

PLEASE HELP IM TIMES AND EXPLAIN STEP BY STEP , so using substitution method solve the system of equations , y = 2x + 8 and y =

4x - 2 , whoever answers step by step gets brainliest
Mathematics
2 answers:
inessss [21]3 years ago
7 0

Answer:

y= 2x + 8 , y = 4x - 2

2x + 8 = 4x - 2

8 = 2x - 2

10 = 2x

5 = x

Step-by-step explanation:

MatroZZZ [7]3 years ago
7 0

Answer:

x = 5

Step-by-step explanation:

y = 2x + 8

substitute the y in the other expression with this expression (you can do it vise versa too but i chose this because it was first)

2x + 8 = 4x - 2

goal is to isolate the variable

add 2 to both sides (this cancels out the -2 on the right side)

2x + 8 + 2 = 4x - 2 + 2

2x + 10 = 4x + 0

2x + 10 = 4x

subtract -2x from both sides (cancels out the 2x on the left side)

2x - 2x + 10 = 4x - 2x

0x + 10 = 2x

10 = 2x

divide both sides by 2 (cancels out the 2 on the right side)

10 ÷ 2 = 2x ÷ 2

5 = 1x

5 = x

variable is isolated and tells us that x = 5

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Misha Larkins [42]

Answer:

B. (12-6) n - 50

Step-by-step explanation:

Given that:

Cost of making hat = $6 per hat

Selling price = $12 per hat

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The profit or money raised from the sales of hat:

Total Revenue from sales - total cost of production - advert cost

Total Revenue from sales = ($12 * n) = $12n

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Advert cost = $50

Hence,

12n - (6n + 50)

12n - 6n - 50

(12 - 6)n - 50

8 0
3 years ago
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yKpoI14uk [10]
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8 0
3 years ago
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11 7/8 + 3 1/5 - ___ = 15
damaskus [11]

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5 0
3 years ago
What is the answer Factorise: 2x² +7x+6.<br><br>​
Mila [183]

Answer:

2x  + 3 )(x   + 2 )

Step-by-step explanation:

2x² + 7x + 6          

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Tested:                                  

6 & 1  but 6 · 2 + 1 = 13 or 6 + 2 · 1  = 8 No

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 all signs are positive

   trinomial  factoring  (            )(            )

                                     (     +     )(      +    )

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The largest number goes with the 2x.

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7 0
3 years ago
Read 2 more answers
The value pi/24 is a solution for the equation 4 cos^4 (4x)-3
MatroZZZ [7]

Answer:

False

Step-by-step explanation:

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Take it to the 4th power

4 ( 9/16) -3 =0

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8 0
3 years ago
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