Answer:
142 degrees
Step-by-step explanation:
As 38 degree and angle 7 form a linear pair, they are supplementary
Let the measure of angle 7 be x
Hence, x+38=180
x=180-38
x=142 degrees
Lets inaugurate the roots


Now coming to options

- π=3.141
- 5/2=2.50
- 2.1
Depending on the size of the track but from what I know, they are normally 400 meters for 1 lap. All you need to do is 5000 divided by 400 which is 12.5 so 5000 meters is 12 and a half laps around the track.
The answer is D. He has to buy less than or equal to 4 masks
I am in eighth grade and I tried my best