Answer:
12
Step-by-step explanation:
86-74=12
You have to subtract the highest by the lowest to find the decrease.
Let point A be
and point B 

Use the point-slope formula and whichever point you want as
, in this case I'll use 

The square roots of 324 is 18
Answer:
7/10 or 0.7
Step-by-step explanation:
cross multiply to get 40x+20=48
subtract 20 from both sides to get 40x=28
divide both sides by 40 to get 7/10
HOPE THIS HELPS!!!:)