Adam wants to observe the amounts of time the students in his middle school spend listening to music every day. For this, he surveys 40 seventh graders in his school. Is the survey sample a valid representation of the entire school, and why?

No. Adam does not survey members of the school band.

No. Adam does not survey students from other grades.

Yes. Adam samples a large group and has a good representation of the school.

Yes. Adam surveys all seventh graders.

idk

step-by-step explanation:

i don't know

c. y = 1/4 x + 5

step-by-step explanation:

first, put the equation of the line on the graph into slope-intercept form

(y = mx + b):   y = -4x + 8

second, a perpendicular line has to have "an opposite/reciprocal slope" to the original slope. so, find the "m" value in your original equation (it's -4, right? )

original slope: m = -4   perpendicular slope: change the sign to its opposite and find the reciprocal ("flip" the number)

new slope is now positive (b/c the original slope was negative 4), and it's 1/4 (not the original slope of 4 or 4/1)

10.416 m/s

step-by-step explantion:

distance=100m

time= 9.6s

average speed=100/9.6

=10.416 m/s