Average speed = Total distance/Time
A = 550km/6.5hr
A = 84.6 km per hr
1.)combine like terms: 12-2x=10x 3-10=-7
10x-7
Answer:
8
Step-by-step explanation:
32 + 72 = 13x
104 = 13x
x = 8
Answer:
The sum of first 50 terms is 3425.
Step-by-step explanation:
Let the first tem of A.P be 'a' and it's common difference be 'd'
Thus the 16th term of the A.P is given by
Now we know that the sum of first 'n' terms of the A.P is given by
Solving equation 'i' and 'ii' simultaneously we get
Thus
Thus the sum of first 50 terms euals