Answer:
Return trip travel time: 7h
Step-by-step explanation:
Let d be the distance.
Index 1 refers to initial trip, index 2 refers to the return trip.
v1=70mi/h
v2=40mi/h
t2=t1+3h, or t1=t2-3h (travel times)
d=v1×t1=v2×t2
v1×(t2-3)=v2×t2
v1 t2 -3 v1=v2 t2
v1 t2 - v2 t2=3 v1
t2(v1-v2)=3v1
t2=3v1/(v1-v2)
Or
t2=3×70/(70-40)=3×70/30=7h
Answer:
80 1/2
Step-by-step explanation:
First, make 3 1/2 into an improper fraction so it is easier to solve.
3*2=6+1=7; 7/2
7/2*23/1
23*7=161
2*1=2
161/2=80.5 or 80 1/2
Answer:
L=10
Step-by-step explanation:
Haley is incorrect because the volume isn't 360
it's 60. I know this because i multiplied the length, width, and height together to get 60.
Answer:
912.
Step-by-step explanation:
It would take 14 minutes for the balloons elevation to change by 315 feet.
