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Sav [38]
3 years ago
10

Can someone help explain how to work this out.

Mathematics
1 answer:
ser-zykov [4K]3 years ago
3 0
Z+2.5=5.2-3.2z
z+3.2z=5.2-2.5
4.2z=2.7
z=9/14
That's your answer and that's how you work out.
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Vsevolod [243]

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Answer:

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The question posed by the engineer is "are residents of the city in favor of ...".

The only representative sample is one from a pool that includes <em>all residents of the city</em>—not just those who (a) use the road, (b) live along the road, or (c)  own homes.

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<em>Additional comment</em>

The engineer may want to refine the question. As posed, it would include children, homeless, and/or institutionalized residents of the city as well as drivers and tax-payers. In inclusive cultural traditions, "residents of the city" may also include animals, plants, water, air, and other holders of spiritual energy.

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dmitriy555 [2]
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4 0
3 years ago
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Lunna [17]
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3 0
2 years ago
What is the ratio the defines pi?
Rufina [12.5K]

Answer:

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The quadratic fomula:

ax^2+bx+c=0\\\\\Delta=b^2-4ac\\\\If\ \Delta0,\ then\ \boxed{TWO\ SOLUTIONS:\ x_1=\dfrac{-b-\sqrt\Delta}{2a}\ and\ x_2=\dfrac{-b+\sqrt\Delta}{2a}}-----------------------------------------------

We have the equation:

2x^2-7x-21=0\\\\a=2,\ b=-7,\ c=-21\\\\\Delta=(-7)^2-4(2)(-21)=49+168=217 > 0\\\\x_1=\dfrac{-(-7)-\sqrt{217}}{2(2)}=\dfrac{7-\sqrt{217}}{4}\approx-1.93\\\\x_2=\dfrac{-(-7)+\sqrt{217}}{(2)(2)}=\dfrac{7+\sqrt{217}}{4}\approx5.43\\\\Answer:\ \boxed{\boxed{2.\ -1.93\ and\ 5.43}}

7 0
3 years ago
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