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
4b <= - 3
b <= -3/4
answer is A
b <= -3/4
Answer:
The number of graduate students attend university A is 
Step-by-step explanation:
Consider the provided information.
We need to determine how many graduate students attend university A?
The number of undergraduate students was n.
The number of graduate students was approximately 25,000 fewer than the number of undergraduate students.
Let G represents the number of graduate student.

Hence, the number of graduate students attend university A is 
There are six marbles total.