Answer:
Given that one hundred students are asked a survey question as they walk through the front gate at their middle school.
Step-by-step explanation:
This a representative sample of the schools population because the sampling is random and is not biased.
Area of triangle is 1/2 b times h. So do 12 times 10= 120 then do 120/2 which equals 60
The number is 6
4x-9=15
4x=24
X=6
Answer:
The correct answer is (b).
Step-by-step explanation:
A line is parallel to the 
axis if it has a slope equal zero. Then if we compute the slope of the line that joins the points 
then
This implies that the line which that joins this points is parallel to the x-axis.
Observe that the slopes of the lines corresponding to the other items are nonzero.
