42m +12
Step-by-step explanation:
6(7m+2)
Distribute
6*7m +6*2
42m +12
Answer:
183.27miles
Step-by-step explanation:
Note that we are considering two planes.
Plane 1
Speed = 140 mph
Time = 2.5 hours
Distance = ?
Speed = distance/time
140 mph = distance/2.5hrs
Distance = 140×2.5
= 350miles
Plane 2
Speed = 170 mph
Time = 2.5 hours
Distance = ?
Speed = distance/time
170 mph = distance/2.5hrs
Distance = 170×2.5
= 425miles
The angle between side is 25 degree
From cosine rule
c^2 = a^2 + b^2 − 2abcos(tetha)
Where a = 350
b = 425miles
c^2 = 350^2+425^2-2(350×425)(cos25)
c^2 = 122500+180625-297500(0.906)
c^2 = 303125-269535
c^2 = 33590
C = √33590
C = 183.27miles
The distance they flew apart after 2.5hrs is 183.27miles
Answer:
10 is the answer
Step-by-step explanation:
You have to multiply with whats inside the roots. you would have 
Answer:
its B
2×x=2x
(x+1)×(x-1)=x²-x+x-1=x²-1
Distribute : 1/2x + 3 = 18
subtract the 3 from both sides: 1/2x= 15
divide: x= 30
