Answer:
aₙ = 6n - 6
Step-by-step explanation:
a1 = 6 x 1 - 6 = 0
a₂ = 6 x 2 - 6 = 6
x + (x + 2) + (x + 4)+(x+6)
=>------------------------------------ = 24
4
4x +12 )
=>------------- = 24
4
=> x + 3= 24 => x = 21
So the largest number is 21+6=27
Answer:
Katherine and Beatrice will meet after 2.5hrs.
Step-by-step explanation:
Given:
Distance between Katherine and Beatrice when they start moving towards each other= 20 miles
Speed at which Katherine runs =5 mph
Speed at which Beatrice walks =3 mph
To Find:
Time taken for Katherine and Beatrice to meet each other
Solution:
Let assume number of hours after which Katherine and Beatrice = x hrs
Distance = speed x time
Distance travelled by Katherine in x hours =
= 5x
Distance travelled by Beatrice in x hours =
= 3x
Total distance covered together by Katherine in x hours and Beatrice in x hours is 20 miles .
=> 5x + 3x = 20
=>8x = 20
=> 
=> 
=> x=2.5
Number of hours after which Katherine and Beatrice meets = x hrs = 2.5hrs
Commutitative property of addition