True because every element ofset a
Your question is really hard to read, but I'll give my best to give you an appropriate answer.
Generally, a sample which best represents the population would usually be one which makes it equally likely for everyone to be included into that sample.
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observing every person walking down Main Street at 5 p.m. one evening to determine the percentage of people who wear glasses
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and measuring the heights of every fiftieth person on the school roster to determine the <span>average heights of the boys in the school calling every third person on the soccer</span><span> </span>
Are surely two. It is questionable if any of the other ones are really randomized and represent the population fairy well or not.
Answer:
yes
Step-by-step explanation:
If 2 lines are perpendicular then the product of their slopes = - 1
The equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
y = - x - 4 ← is in slope- intercept form
with slope m = - 1
5x - 5y = 20 ( subtract 5x from both sides )
- 5y = - 5x + 20 ( divide all terms by - 5 )
y = x - 4 ← in slope- intercept form
with slope m = 1
Thus product of their slopes is - 1 × 1 = - 1
Therefore the lines are perpendicular
Answer:
10
Step-by-step explanation:
|-8| = 8
2x - 2 + 5 = 13
<span>2x = 13 + 2 - 5 or 10 </span>
<span>x = 5</span>