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Sever21 [200]
3 years ago
12

Can someone understand this i know its substitution for sure if i dont get wrong

Mathematics
1 answer:
svlad2 [7]3 years ago
7 0

4x - y = 3

y = 2x + 13


Substitute the second equation into the first equation:

4x - y = 3  [since y = 2x + 13, you can substitute (2x + 13) for "y" in the equation]

4x - (2x + 13) = 3    Distribute/multiply - into (2x + 13)

4x - 2x - 13 = 3  

2x - 13 = 3       Add 13 on both sides

2x = 16     Divide 2 on both sides

x = 8


Now that you know x = 8, plug it into one of the equations to find y

y = 2x + 13

y = 2(8) + 13

y = 16 + 13

y = 29


x = 8, y = 29  or  (8, 29)


[proof]

4x - y = 3

4(8) - 29 = 3

32 - 29 = 3

3 = 3


y = 2x + 13

29 = 2(8) + 13

29 = 16 + 13

29 = 29


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Question Number 16 You are the head seamstress at a boutique that specializes in making prom dresses. You are supervising the co
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This dress will be sold in the boutique for $6,716.25.

<h3><u>Price calculation</u></h3>

Given that a new style of dress will take 180 hours of work to complete, and twenty percent of this time is for beading, thirty-five percent of this time is for adding ruffles, and the remaining time is divided equally between embroidery and sewing, and when pricing this style, hourly labor and material costs are $40 for beading, $35 for ruffles, $20 for embroidery, and $18 for sewing, and the dress is then sold in the showroom for 25% more than the cost of labor and materials, To determine how much this dress will sell for in the boutique, the following calculation must be made:

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Therefore, this dress will be sold in the boutique for $6,716.25.

Learn more about price calculation in brainly.com/question/14695611

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Answer: The result can be shown in multiple forms.

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0.030 because 3 times 10 is 30 so replace the 0 with a 3 and move the 0 after the 3.
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Read 2 more answers
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