Hello from MrBillDoesMath!
Answer:
x = 140
Discussion:
Please clarify! It appears from the diagram that x + 40 = 180 (nothing to do with parallel lines). Then
x + 40 = 180 => subtract 40 from each side
x + 40 - 40 = 180 -40
x = 140
I doubt this is what was meant. I will update this answer if you provide more info.
BTW: y = 40 degrees as alternate interior angles created by a transversal cutting parallel lines are equal.
Thank you,
MrB
Answer: False. 21 Shelves.
Step-by-step explanation:
First, 12 x 31= 372
This indicates that there are 372 books.
Then, 372 ÷ 18= 20.6666666667
Since we have a decimal that is above 4 we round up.
This leaves 21 shelves needed for all the books o fit on a shelf.
Sector area = (central angle / 360) * PI * radius^2
sector area = (60 / 360) * PI * 25
<span><span><span>sector area = 13.08996939
</span>
square inches
</span> </span><span>sector area = 13.1 (rounded) </span><span>square inches
</span>