Answer:
C Both the mean and median are appropriate measures of center.
Step-by-step explanation:
Answer:
a) 45
Step-by-step explanation:
Writing the equation that governs this situation:
-3C - (2.5C/hr)x = -18C
Simplifying, -3 - 2.5x = -18, or 3 + 2.5x = 18
Combining like terms: 2.5x = 18-3 = 15
Then x = 15/2.5 = 6. The temp. will reach -18C after 6 hours.
Y= 2x-3 i think, but i may be wrong
Answer:
140 mile
Step-by-step explanation:

While x is the speed of the second train.