<span>1. a portion of a large group -> sample
the sample is the part that you select from a population to analyze.
2. choosing a sample so that every member has an equal chance of being chosen -> random sample
in a random sample any member of the group has the same probabilities to be selected.
3. choosing a sample from people who are under 15 years old -> biased sample
when you select based on a characteristic of the group you are running a biased sampling.
4. using the responses of a small group to make conclusions about the large group. -> estimating from a sample
statistics searches to infere information about a large group using the responses from a sample
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You must have the distances mixed up when you typed it because it does not work out equation-wise the way you have it. The distance comes out negative, and distance NEVER should come out negative. If you switch the distances traveled you get that the passenger train is going 60 and the freight train is going 40, which makes sense because if the passenger train is going 60 and the freight train is going 40 which is the 20 mph difference we were told exists between the 2 trains.
Answer:
Let p(x) = x3 + ax2 + bx +6
(x-2) is a factor of the polynomial x3 + ax2 + b x +6
p(2) = 0
p(2) = 23 + a.22 + b.2 +6 =8+4a+2b+6 =14+ 4a+ 2b = 0
7 +2 a +b = 0
b = - 7 -2a -(i)
x3 + ax2 + bx +6 when divided by (x-3) leaves remainder 3.
p(3) = 3
p(3) = 33 + a.32 + b.3 +6= 27+9a +3b +6 =33+9a+3b = 3
11+3a +b =1 => 3a+b =-10 => b= -10-3a -(ii)
Equating the value of b from (ii) and (i) , we have
(- 7 -2a) = (-10 - 3a)
a = -3
Substituting a = -3 in (i), we get
b = - 7 -2(-3) = -7 + 6 = -1
Thus the values of a and b are -3 and -1 respectively.
Step-by-step explanation:
Answer:
there is no solution 64x-16=64x-16
Step-by-step explanation:
if you distrubute then you will see the numbers are the same on both sides
Answer:
Yes, if you divide the $63.96 by the 7 pounds you get $9.13
Step-by-step explanation: