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FinnZ [79.3K]
2 years ago
11

What are the y-intercepts to graph the equation-4x - 3y = 36

Mathematics
2 answers:
Eddi Din [679]2 years ago
6 0

Answer:

Y-Int = -12

Step-by-step explanation:

First, I would change the equation to slope intercept form:

-3y = 36 + 4x

3y = -36 - 4x

y = -12-4/3x

y = -4/3x - 12

Vladimir [108]2 years ago
3 0

Simplifying

-4x + -3y = 36

Solving

-4x + -3y = 36

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '3y' to each side of the equation.

-4x + -3y + 3y = 36 + 3y

Combine like terms: -3y + 3y = 0

-4x + 0 = 36 + 3y

-4x = 36 + 3y

Divide each side by '-4'.

x = -9 + -0.75y

Simplifying

x = -9 + -0.75y

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Mars2501 [29]

a. What is the cost expression for the newspaper? 


The cost would be the sum of fixed cost and the variable cost. The fixed cost is 70 while the variable cost is 0.40 x, where x stands for the number of copies made. That is:

Cost = 70 + 0.40 x            

where x = number of copies made


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The revenue would simply be the product of selling price and number of copies sold or made, that is:

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c. Put the cost and revenue expressions into an inequality that would represent a successful newspaper. 


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0.50 x – (70 + 0.40 x) > 0


d. How many copies should be sold to make a profit? Show all work! An answer with no work will receive 0 points. 

From the above equation, we solve for x.

0.50 x – (70 + 0.40 x) > 0

0.50 x – 70 – 0.40 x > 0

0.10 x > 70

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e. Now go back to your answer for d. On every line of your solution write what property of math you would use to justify the transformation that occurred. 

 

0.50 x – (70 + 0.40 x) > 0                Distribution property

0.50 x – 70 – 0.40 x > 0                    Addition property

0.10 x > 70                                           Addition property

x > 700                                                  Division property

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