Answer:
x=-2,y=-3
Step-by-step explanation:
x=7+3x
-3x+8y=-18
-21-y=-18
x=7+3x
y=-3
x=7+3x
x=-2
y=-3
The mean of 10 randomly selected students is definitely more likely to be closer to 75. 10 randomly selected students to include information and are more like to reflect the class’s scores. Consider an extreme example. Seventy-five students in a class of 100 earned perfect scores. The other 25 earned zeros. The average score of the class would be 75. A sample of 10 random students would almost certainly include more 100s then 0s, but both would be included in the sample. The mean of this samples score is closer to 75 than any individuals.
Answer:
Option B is right.
Step-by-step explanation:
Whenever a system of inequalities is given, normally we will get a collection of points that satisfy all the inequalities in the system
Option B is right
Option A is wrong because a single point cannot be a solution for all inequalities of a system normally an interval would be there
Option C is wrong since a single point if satisfies atleast one cannot be solution for the full system unless it satisfied all inequalities
Option D is wrong because satisfying atleast one inequality is not sufficient but satisfying all inequalities is a must.
Answer:
We know that the total area under the normal curve is 100%. According to the empirical rule of Normal distribution:
Approximately, 68% of data lies within 
standard deviations of mean.
Approximately, 95% of data lies within 
standard deviations of mean.
Approximately, 99.7% of data lies with 
standard deviations of mean,
Therefore, in a normal curve, roughly 95% of all cases fall within plus or minus two standard deviations.
I don’t know if this is the answer but.. An angle generated by one complete counterclockwise rotation measures 360° or 21 radians. 360° An angle generated by one complete clockwise rotation measures -360° or -21 radians.
