A school principal to observe how the natural circulation of air has an affect on Classroom morning. The principal randomly chooses a group of students of same age and grade and places them in a room with open windows the test scores of the classes are recorded and analyzed the end of the semester. How could this observation be changed into a valid experiment effects of air circulation

step-by-step explanation:

we are given

since, we have to isolate x on anyone side

so, we can move all x terms on one side

subtract both sides by 2x

add both sides by 9

divide both sides by 4

we get

it would more likely be bald eagle because its has more in the box so about 75%.

step-by-step explanation:

2500

step-by-step explanation:

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m