Step-by-step explanation:
I'm not sure what you mean by 'written method' but the sum is 2,654.
Remark
Average in this case does not mean you take (s1 + s2)/2. What average speed means is Total Distance / Total Time.
Formula
Average speed(s) = Total Distance / Total Time
Givens
Total Distance = 252 + 30 = 282 miles
Total Time = 5 hours.
Substitute and Solve
Average speed = 282 / 5
Average speed = 56.4 miles / hour <<<<< Answer.
The other facts are not used.
For instance take 9; 9x4= 36
So it will be equal
D(3,-2 is the answer hope I helped:)
Answer:
7
Step-by-step explanation:
7 x 3 = 21
