Answer:
Perpendicular lines are lines that intersect at right angles. If you multiply the slopes of two perpendicular lines in the plane, you get −1 . That is, the slopes of perpendicular lines are opposite reciprocals .
Hope this help:)
Answer:
9 boxes.
Step-by-step explanation:
6 boxes cost 4 dollars
Therefore 1 box costs 4/6 = 2/3 dollar.
So for 6 dollars you can buy 6 / 2/3
= 6*3/2
= 9 boxes.
100 cm = 1 m => 1 cm = 1/100 m so, 86000 cm = 86000 * (1/100) m = 86000/100 m = 860 m now, 1000 m = 1 km => 1 m = 1/1000 km so, 860 m = 860 * (1/1000) km = 860/1000 km = 0.86 km so, 86000 cm = 0.86 km
