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julia-pushkina [17]
3 years ago
8

Need help with this question​

Mathematics
1 answer:
FinnZ [79.3K]3 years ago
6 0

Answer:

4n^2 - 3n + 7

Step-by-step explanation:

Area is length x width. If the width is 5n^2, we have to factor that out of each variable of the area

Area: 20n^4 - 15n^3 + 35n^2

20n^4 divided by 5n^2 = 4n^2

-15n^3 divided by 5n^2 = -3n

35n^2 divided by 5n^2 = 7

So the length is 4n^2 - 3n + 7

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What adds ups to 5 but multiplies to give you 12
qaws [65]
X + y = 5
    xy = 12

x + y = 5
      y = -x + 5

                xy = 12
      x(-x + 5) = 12
  x(-x) + x(5) = 12
       -x² + 5x = 12
             - 12   - 12
-x² + 5x - 12 = 0
 x² - 5x + 12 = 0
x = 5 ± √25 - 48
                2
x = -5 ± √-23
           2
x = -5 ± 4.79i
            2
x = -5 + 4.79i    or    x = -5 - 4.79i
            2                              2
x = -2.5 + 2.395i   or    x = -2.5 - 2.395i
y = -2.5 - 2.395i   or    y = -2.5 + 2.395i

The two numbers that add up to 5 and multiply to 12 is -2.5 ± 2.395i, which is -2.5 + 2.395i and -2.5 - 2.395i.
6 0
3 years ago
Jenny was planting flowers for her garden. she had to plant 4 rose flowers for every Jasmine flower she planted. if she plants 1
pychu [463]
20 jasmine flowers? just do tally marks and count how many times you did them because each tally has five so you subtract the four from the five and count the tallys you have left
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3 years ago
Read 2 more answers
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eimsori [14]

Answer:

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Step-by-step explanation:

60/40=1.5

90/1.5=60

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Let:

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y = Cost of order

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For each pastry Cole ordered, the cost of the order increased by a fixed amount of $1.55

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1 year ago
What is the solution set of the following system of equations?
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