90 minutes because 20 + 20 + 20 + 20 + 10 = 90
Answer:
The answer is 1 13/27.
Step-by-step explanation:
First, convert any mixed numbers to fractions --
the initial equations then reads as 5/3 x 8/9.
Then, applying the fractions formula for multiplication --
5 x 8 / 3 x 9
40/27
Simplifying the above --
1 13/27
To rotate something 180 degrees around the origin, you apply the rule
(x, y) ---> (-x, -y)
So (-4, -5) would become (4, 5).
