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UkoKoshka [18]
3 years ago
13

Write the equation in the form Ax + By = C. Find an equation of a line passing through the pair of points (-7,3) and (-8,-9).

Mathematics
1 answer:
Illusion [34]3 years ago
3 0

Answer:

  12x -y = -87

Step-by-step explanation:

You can start with the 2-point form of the equation of a line and manipulate it to give you the standard form.

  y = (y2 -y1)/(x2 -x1)(x -x1) +y1

  y = (-9 -3)/(-8 -(-7))(x -(-7)) +3

  y = (-12/-1)(x +7) +3

  y = 12x +84 +3

  -12x +y = 87 . . . . . subtract the x-term

  12x -y = -87 . . . . . . make the leading coefficient positive (per standard form)

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A music industry researcher wants to estimate, with a 90% confidence level, the proportion of young urban people (ages 21 to 35
Maslowich

Answer:

1,539

Step-by-step explanation:

Using Simple Random Sampling in an infinite population (this is such a large population that we do not know the exact number) we have that the sample size should be the nearest integer to

\large \frac{Z^2pq}{e^2}

where

<em>Z= the z-score corresponding to the confidence level, in this case 90%, so Z=1.645 (this means that the area under the Normal N(0,1) between [-1.645,1.645] is 90%=0.9) </em>

<em>p= the proportion of young urban people (ages 21 to 35 years) who go to at least 3 concerts a year= 35% = 0.35 </em>

<em>q = 1-p = 0.65 </em>

<em>e = the error proportion = 2% = 0.02 </em>

Making the calculations

\large \frac{Z^2pq}{e^2}=\frac{(1.645)^2*0.35*0.65}{(0.02)^2}=1,539.09

So, the sample size should be 1,539 young urban people (ages 21 to 35 years)

6 0
3 years ago
What is this answer -v+5+6v=1+5v+3
vivado [14]

Answer:

no solution

Step-by-step explanation:

Given

- v +5 + 6v = 1 + 5v + 3 ← combine like terms on both sides

5v + 5 = 5v + 4 ( subtract 5 from both sides )

5v = 5v - 1 ( subtract 5v from both sides )

0 = - 1 ← not possible

Hence the equation has no solution

8 0
3 years ago
QT 1.
Delvig [45]
Median is the middle to find it you have to organize the list.

 2, 4, 4, 5, 6, 7, 8, 8, 8.

cross them out one by one from the ends and you get 6.

your answer will be B. $6

hope this helped!

:)
6 0
3 years ago
Please help me, I will mark as brainliest.
FrozenT [24]
I think it is student 1
7 0
2 years ago
Ajay is on the swim team. He improved his time on
ozzi

Answer:

<u>5%</u>

Step-by-step explanation

50/32= 1.56yard per second        ; 50/31= 1.61 yard per second

1.61-1.56= 0.05* 100= 5%

5 0
3 years ago
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