Answer:45 mi/h
Step-by-step explanation:
Recall: Speed = distance / time
Let the time taken for the morning journey be 
and the time taken for the afternoon journey be ,and the distance covered be d
that means for the first journey,
30 = 
d = 30
Also for the afternoon journey,
d = 60 
Equating the two , since the same distance is being covered , we have
30 = 60
that is
= 
= 2
Also ,
total distance covered = 30 + 60
Average speed = total distance / total time
= 30 + 60 / +
Recall that = 2 , substitute this into the formula for average speed , then we have
Average speed = 30(2) +60 / 3
Average speed = 120 / 3
Therefore :
Average speed = 40 mi/hr
Answer:
135 cm²
Step-by-step explanation:
The area (A) of a trapezoid is calculated as
A = 
h(a + b)
where h is the height and a, b the parallel bases
Here h = 9, a = 13 and b = 17 , thus
A = × 9 × (13 + 17)
= 0.5 × 9 × 30
= 135 cm²
Answer:5
Explaining:
10% of 50
= 10%=10/100 = 0.1
= 0.1 (x) times 50
= 5
The fraction of the total distance Sasha traveled to her aunts house is 6/7
Step-by-step explanation:
