I think you meant to type
4(n)-5=7.
4n = 7 + 5
4n = 12
n = 12/4
n = 3
Answer:
60 books in one bookcase
12 books in one shelf
plz mark brainliest
Step-by-step explanation:
figures is one bookshelf =240/4
figures in each shelf=240/4*5
Answer:
Here we can see they are vertically opposite angles so x = 35°
The picture is difficult to read, but it looks like
∠ADB = 2x²
∠ACB = 10x
These two angles have equal measure, so you have
2x² = 10x
2x(x -5) = 0 . . . . . subtract 10x and factor
x = 0, or x = 5
The measure of arc AB is twice the measure of either inscribed angle, so would be
arc AB = 2×10x
= 2×10×5
= 100 . . . . . degrees
Arc AB is 100°.
