( 1, -1 )
( -2, 1 )
&
( -4, 2 )
Using the student id given above, a = 19 and b = 7
Average speed for the first 54 km = 48+a km/h
Plug a = 19
Average speed for the first 54 km = 48+19 = 67 km/h
Average speed for remaining 86 km = 43-b km/h where b = 7
Average speed = 36 km/h
Average speed of entire journey = total distance / total time taken
Time taken to cover 54 km = hr
Time take to cover 86 km = hr
Total time taken = 3.2 hours.
Total distance = 86+54= 140 km
Average speed of the entire trip = = 43.75 km/ h
Answer: 85
Step-by-step explanation:
I = prt
I = .035(50)(20)
I = 35
35 + 50 = 85
sorry if wrong but i think its the answer
Answer:
1st option
Step-by-step explanation:
We are summing the expression for n = 1 to n = 4 , that is
+ + +
1 ! = 1, 2! = 2 × 1 = 2 , 3! = 3 × 2 × 1 = 6 , 4! = 4 × 3 × 2 × 1 = 24 , then
+ + +
= 1 + 1 + +
Answer:
x=3 (C)
Step-by-step explanation: