Answer:
2 miles
Step-by-step explanation:
Their combined speed (speed of closure) is 80 mph + 40 mph = 120 mph.
120 mi/h = 120 mi/(60 min) = 2 mi/min
The distance between the trains at the 1-minute mark is ...
(1 min) · (2 mi/min) = 2 mi
They were warned when two miles apart.
Answer:
n=4
Step-by-step explanation:
Distribute the 8. and then subtract 8n from both sides and divide 40 and 10n.
Yes, I can solve that inequality.
Any value of ' r ' that's less than 1/3 is a solution.
Answer:
y=5/3x-13
Step-by-step explanation:
We must use the point-slope form(parallel lines have the same slope, remember that!)
y-y1=m(x-x1)
y-2=5/3(x-9)
y-2=5/3x-15
y=5/3x-13
Answer:
Average speed=52 miles per hour
Step-by-step explanation:
The expression for calculating the average speed is as follows;
S=D/T
where;
S=average speed
D=distance traveled
T=time taken
In our case;
S=unknown
D=130 miles
T=2 1/2 hours=2.5 hours
replacing;
Average speed=130/2.5=52 miles per hour
Average speed=52 miles per hour
