2n-5=21
add 5 to both sides
2n=26
divide both sides by 2
n=13
I hope I helped! :)
Answer:
24 minutes
Step-by-step explanation:
figure out how much time he spent in total from the times given which is an hour and 42 minutes
subtract 31 minutes to account for science
then add 16 to 31 which gives you 47 then subtract that from the time still left
Then the time left after subtracting 47 and 31 gives you 24 minutes which is how much tyler spent on reading
Answer: 
Step-by-step explanation:

Answer:

Step-by-step explanation:
we know that
The area of the shaded sections is equal to the area of the circle minus the area of the triangle
so

where
----> the radius is half the diameter

substitute


Try using M-A-T-H-W-A-Y it is very helpful