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DerikF9478
10.07.2019 •
Mathematics
Write the slope intercept form of the equation through: (-1,3) ,parallel to y=3x-1
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Ответ:
slopes of two parallel lines are equal
from the equation y=3x-1, slope =3
using slope m=3 and point (-1,3) , we find the y intercept
y=mx+b
3=3(-1) +b
b=6
plugging m=3 and b=6 in slope intercept form to get the equation
y=3x+6
Ответ:
Our margin of error is 4%, or 0.04. We use the formula
To find the z-score:
Convert 98% to a decimal: 0.98
Subtract from 1: 1-0.98 = 0.02
Divide both sides by 2: 0.02/2 = 0.01
Subtract from 1: 1-0.01 = 0.99
Using a z-table (http://www.z-table.com) we see that this value has a z-score of approximately 2.33. Using this, our margin of error and our proportion, we have:
Divide both sides by 2.33:
Square both sides:
Multiply both sides by n:
Divide both sides to isolate n: